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Sample records for central precocious puberty

  1. Precocious Puberty in Children

    International Nuclear Information System (INIS)

    Atta, I.; Laghari, T. M.; Khan, N. Y.; Lone, W. S.; Ibrahim, M.; Raza, J.

    2015-01-01

    Objective: To determine the etiology of precocious puberty in children and to compare the clinical and laboratory parameters of central and peripheral precocious puberty. Study Design: Cross-sectional study. Place and Duration of Study: Endocrine Clinic at National Institute of Child Health, Karachi, from January 2009 to December 2011. Methodology: Children presenting with precocious puberty were included. The age of onset of puberty was documented. Clinical evaluation, Tanner staging, height, height SDS, weight, weight SDS, body mass index, bone age, pelvic USG, plasma estradiol level and GnRH stimulation were done. Ultrasound of adrenal glands, serum level of 17 hydroxyprogesterone, ACTH, Renin, aldosterone and testosterone were performed in children with peripheral precocious puberty. MRI of adrenal glands and gonads was done in patients with suspected tumor of that organ and MRI of brain was done in patients with central precocious puberty. Skeletal survey was done in patients with Mc Cune-Albright syndrome. Results: CAH (81.8%) indentified as a main cause in peripheral percocious puberty and idiopathic (67.74%) in central precocious puberty. Eighty five patients were registered during this period. The conditions causing precocious puberty were central precocious puberty (36.47%), peripheral precocious puberty (38.82%), premature pubarche (10.58%) and premature thelarche (14.11%). There was a difference in the age of onset of puberty in case of central precocious puberty (mean=3, 2-6 years) versus peripheral precocious puberty (mean=5.25; 3.62 - 7.0 years). Children with central precocious puberty showed higher height SDS, weight SDS, FSH, LH than those with peripheral precocious puberty. Conclusion: Etiology in majority of cases with peripheral precocious puberty was congenital adrenal hyperplasia and idiopathic in central precocious puberty. Central precocious puberty children showed higher height SDS, weight SDS, FSH, LH than peripheral precocious puberty

  2. MRI study of pituitary in girls with central precocious puberty

    International Nuclear Information System (INIS)

    Ye Zhiqiu; Guo Qinglu; Feng Changzheng; Wei Beiyang; Liu Yongxi; Zhang Yan

    2008-01-01

    Objective: To study the shape, size and signal intensity of pituitary gland in girls aged 3-10 year old with central precocious puberty. Methods: MRI data of pituitary glands in 40 girls aged 3-10 years old with central precocious puberty were selected. The shape, height and the appearances of pituitary glands were measured and observed on sagittal T 1 WI. Results: Quantitative data about size, shape and single intensity changes of pituitary glands in central precocious puberty were obtained in two groups, including girls aged from 3-5 and 5-10. The convex pituitary gland were 85.0% in former group. The height of pituitary gland were 6.1±0.2mm (former group) and 6.4± 0.4mm (latter one) respectively. The width of pituitary stalk was 1.93±0.50mm. The posterior pituitary gland demonstrated high signal intensity in all cases. Conclusion: Obvious changes of the size and shape of pituitary glands were found in central precocious puberty of girls aged from 3-10. The pituitary glands manifested physiologic hypertrophy with more convex in central precocious puberty girls than in normal ones. The changes on MRI could reflect the function of hypothalamus-pituitary-gonadal axis. It is of important value and significance in the diagnosis of central precocious puberty. (authors)

  3. Central precocious puberty: evaluation by neuroimaging

    International Nuclear Information System (INIS)

    Kornreich, L.; Horev, G.; Blaser, S.; Daneman, D.; Kauli, R.; Grunebaum, M.

    1995-01-01

    To evaluate the incidence of abnormal intracranial findings in children with central precocious puberty, 62 children (51 girls, 11 boys) were examined by computerized tomography and/or magnetic resonance imaging (MRI) of the brain. Forty-four had normal examinations; 18 (11 girls, 7 boys) showed intracranial pathologies, including hamartoma of the tuber cinereum (8 cases), parenchymal loss (3 cases), hypothalamicchiasmatic lesions (2 cases), lesions of the corpus callosum (2 cases), suprasellar cyst (1 case), and pineal cyst and mesiotemporal sclerosis (1 case each). Based on the correlation between the clinical and the imaging results of this series, the authors recommend MRI as the imaging method of choice in the investigation of precocious puberty. (orig.)

  4. Central precocious puberty: evaluation by neuroimaging

    Energy Technology Data Exchange (ETDEWEB)

    Kornreich, L. [Dept. of Pediatric Imaging, Children`s Medical Center of Israel, Petah Tiqva (Israel)]|[Sackler Faculty of Medicine, Tel Aviv Univ. (Israel); Horev, G. [Dept. of Pediatric Imaging, Children`s Medical Center of Israel, Petah Tiqva (Israel)]|[Sackler Faculty of Medicine, Tel Aviv Univ. (Israel); Blaser, S. [Dept. of Radiology, Hospital for Sick Children, Toronto, ON (Canada); Daneman, D. [Div. of Endocrinology, Dept. of Pediatrics, Hospital for Sick Children, Toronto, ON (Canada); Kauli, R. [Sackler Faculty of Medicine, Tel Aviv Univ. (Israel)]|[Inst. of Pediatric and Adolescent Endocrinology, Children`s Medical Center of Israel, Petah Tiqva (Israel); Grunebaum, M. [Dept. of Pediatric Imaging, Children`s Medical Center of Israel, Petah Tiqva (Israel)]|[Sackler Faculty of Medicine, Tel Aviv Univ. (Israel)

    1995-02-01

    To evaluate the incidence of abnormal intracranial findings in children with central precocious puberty, 62 children (51 girls, 11 boys) were examined by computerized tomography and/or magnetic resonance imaging (MRI) of the brain. Forty-four had normal examinations; 18 (11 girls, 7 boys) showed intracranial pathologies, including hamartoma of the tuber cinereum (8 cases), parenchymal loss (3 cases), hypothalamicchiasmatic lesions (2 cases), lesions of the corpus callosum (2 cases), suprasellar cyst (1 case), and pineal cyst and mesiotemporal sclerosis (1 case each). Based on the correlation between the clinical and the imaging results of this series, the authors recommend MRI as the imaging method of choice in the investigation of precocious puberty. (orig.)

  5. Central precocious puberty: from physiopathological mechanisms to treatment.

    Science.gov (United States)

    Chirico, V; Lacquaniti, A; Salpietro, V; Buemi, M; Salpietro, C; Arrigo, T

    2014-01-01

    Puberty is a complex, coordinated biological process with multiple levels of regulations. The timing of puberty varies greatly in children and it is influenced by environmental, endocrine and genetic factors. Precocious puberty (PP) is an important issue, affecting between 1 in 5.000-10.000 children. The physiopathological mechanism is still unknown. From an etiological point of view, PP may be subdivided into gonadotropin-releasing hormone (GnRH) -dependent and independent causes. GnRH-dependent PP, often called central precocious puberty (CPP), is based on hypothalamic-pituitary-gonadal axis activation associated with progressive pubertal development, accelerated growth rate and advancement of skeletal age. Conversely, peripheral precocious puberty (PPP) is related to sex steroid exposure, independently of hypothalamic-–pituitary-–gonadal (HPG) axis activation. Kisspeptins play a central role in the modulation of GnRH secretion with peripheral factors that influence the timing of puberty, such as adipokines and endocrine disrupting chemicals. Moreover, PP could be related to genetic disorders, involving pivotal genes of the HPG axis. The standard test used to verify HPG activity is the gonadotropin response to administered GnRH analogs. We describe the physiopathological mechanisms of PP and its clinical implications, analysing diagnostic flow-chart and new potential biomarkers that could reveal PP. An update of the current literature was also carried out regarding the recent novelty for treatment.

  6. Safety Extension Study Of Leuprolide Acetate (Lupron Depot) In The Treatment Of Central Precocious Puberty

    Science.gov (United States)

    2014-01-08

    Precocious; Leuprolide Acetate; Luteinizing Hormone (LH); Gonadotrophin-releasing Hormone Agonist (GnRHa); Tanner Staging; Depot Formulation; Suppression of LH; Central Precocious Puberty (CPP); Gonadotrophin-releasing Hormone (GnRH); Lupron; GnRH Analog; Pediatrics Central Precocious Puberty

  7. Central precocious puberty in girls

    International Nuclear Information System (INIS)

    Argyropoulou, M.; Malandry, F.; Perignon, F.; Brunelle, F.; Brauner, R.; Rappaport, R.

    1990-01-01

    The treatment of central precocious puberty (CPP) in girls depends on its etiology and evolution, the latter based on the degree of accelerated bone maturation. The goal of this paper is to assess the diagnostic value of MR imaging in studying CPP in girls. Thirty-four girls with CPP were studied with MR imaging. Pituitary gland height (PGH) was measured on a sagittal midline image and compared with normal measurements. Correlations among clinical presentation, PGH, estradiol levels, and LH/FSH ratio were evaluated

  8. Hormonal changes during GnRH analogue therapy in children with central precocious puberty

    DEFF Research Database (Denmark)

    Müller, J; Juul, A; Andersson, A M

    2000-01-01

    Gonadotropin releasing hormone analogues (GnRHa) have been used for treatment of central precocious puberty (CPP) for more than 15 years. They are generally considered safe although data on potential long-term side effects are scarce. However, GnRHa therapy has profound effects on both the hypoth......Gonadotropin releasing hormone analogues (GnRHa) have been used for treatment of central precocious puberty (CPP) for more than 15 years. They are generally considered safe although data on potential long-term side effects are scarce. However, GnRHa therapy has profound effects on both...

  9. Idiopathic central precocious puberty in a Nigerian boy | Ojukwu ...

    African Journals Online (AJOL)

    A case of idiopathic central precocious puberty, a rare condition is reported in a 21/2 year-old Nigerian boy. He presented with progressive genital growth, a growth spurt, advanced skeletal maturation, and inappropriately high serum concentrations of pituitary and gonadal sex homones for his age. There was no family ...

  10. Insulin sensitivity and lipid profiles in girls with central precocious puberty before and during gonadal suppression

    DEFF Research Database (Denmark)

    Sørensen, Kaspar; Mouritsen, Annette; Mogensen, Signe Sloth

    2010-01-01

    Early menarche is associated with increased risk of cardiovascular disease in adulthood. It is unknown whether metabolic risk factors are adversely affected in girls with central precocious puberty (CPP) already at time of diagnosis.......Early menarche is associated with increased risk of cardiovascular disease in adulthood. It is unknown whether metabolic risk factors are adversely affected in girls with central precocious puberty (CPP) already at time of diagnosis....

  11. Virilizing adrenocortical carcinoma advancing to central precocious puberty after surgery.

    Science.gov (United States)

    Kim, Min Sun; Yang, Eu Jeen; Cho, Dong Hyu; Hwang, Pyung Han; Lee, Dae-Yeol

    2015-05-01

    Adrenocortical carcinoma (ACC) in pediatric and adolescent patients is rare, and it is associated with various clinical symptoms. We introduce the case of an 8-year-old boy with ACC who presented with peripheral precocious puberty at his first visit. He displayed penis enlargement with pubic hair and facial acne. His serum adrenal androgen levels were elevated, and abdominal computed tomography revealed a right suprarenal mass. After complete surgical resection, the histological diagnosis was ACC. Two months after surgical removal of the mass, he subsequently developed central precocious puberty. He was treated with a gonadotropin-releasing hormone agonist to delay further pubertal progression. In patients with functioning ACC and surgical removal, clinical follow-up and hormonal marker examination for the secondary effects of excessive hormone secretion may be a useful option at least every 2 or 3 months after surgery.

  12. An FSH and TSH pituitary adenoma, presenting with precocious puberty and central hyperthyroidism

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    Guadalupe Vargas

    2017-07-01

    Full Text Available A 19-year-old woman with a history of isosexual precocious puberty and bilateral oophorectomy at age 10 years because of giant ovarian cysts, presents with headaches and mild symptoms and signs of hyperthyroidism. Hormonal evaluation revealed elevated FSH and LH levels in the postmenopausal range and free hyperthyroxinemia with an inappropriately normal TSH. Pituitary MRI showed a 2-cm macroadenoma with suprasellar extension. She underwent successful surgical resection of the pituitary tumor, which proved to be composed of two distinct populations of cells, each of them strongly immunoreactive for FSH and TSH, respectively. This mixed adenoma resulted in two different hormonal hypersecretion syndromes: the first one during childhood and consisting of central precocious puberty and ovarian hyperstimulation due to the excessive secretion of biologically active FSH and which was not investigated in detail and 10 years later, central hyperthyroidism due to inappropriate secretion of biologically active TSH. Although infrequent, two cases of isosexual central precocious puberty in girls due to biologically active FSH secreted by a pituitary adenoma have been previously reported in the literature. However, this is the first reported case of a mixed adenoma capable of secreting both, biologically active FSH and TSH.

  13. Etiology of precocious puberty, 10 years study in Endocrine Reserch Centre (Firouzgar, Tehran

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    Fatemeh Safari

    2012-01-01

    Full Text Available Background: Precocious puberty, as early physical development and low final height might lead to psychosocial problems.Objective: To evaluate etiology and clinical feature of precocious puberty in a cohort of Iranian children.Materials and Methods: In this case-series study, 44 girls and 8 boys with precocious puberty referred to Endocrine Reserch Centre (Firouzgar, Institute of Endocrinology and Metabolism (Hemmat Campus, were examined in a 10 years period of time. Results: Mean age of girls and boys was 7.43±1.4 years and 5.8±2.1 years respectively. Most of the patients fell within the age category of 7-7.9 years old (40.9% for girls and 50% for boys. Patients, concerning etiology of precocious puberty were classified in three categories: 42.6% of patients had central precocious puberty (CPP, including idiopathic CPP (87.5% and neurogenic CPP (12.5%. 23.3% of patients had peripheral precocious puberty (PPP, including congenital adrenal hyperplasia (CAH (42.8%, ovarian cysts (28.4%, McCune-Albright syndrome (14.2% and adrenal carcinoma (14.2%. 34.1% of girls and 25% of boys had normal variant puberty including premature thelarche (57%, premature adrenarche (38% as well as premature menarche (4.7%l. Conclusion: The most common etiology of precocious puberty in girls was idiopathic central precocious puberty and premature thelarche, while in boys they were neurogenic central precocious puberty and CAH. Therefore precocious puberty in girls is usually benign. In boys, CNS anomalies should first be considered in the differential diagnosis of CPP. Therefore brain Magnetic Resonance Imaging (MRI is mandatory in all cases.

  14. Prospective assessment of pituitary size and shape on MR imaging after suppressive hormonal therapy in central precocious puberty

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    Beek, J.T. van; Sharafuddin, M.J.A.; Kao, S.C.S. [Department of Radiology-JPP 3889, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52246 (United States); Luisiri, A. [Cardinal Glennon Children' s Hospital, St. Louis, Missouri (United States); Garibaldi, L.R. [Children' s Hospital of New Jersey, Newark Beth Israel Medical Center, Newark, New Jersey (United States); St. Barnabas Medical Center, Livingston, New Jersey (United States)

    2000-07-01

    Objective. The diagnostic significance of an enlarged pituitary gland regarding both shape and size parameters on MR imaging has previously been demonstrated in children with central precocious puberty. This study was designed to assess changes in these parameters following successful suppressive therapy of central precocious puberty with the gonadotropin-releasing hormone (GnRH) analogue. Materials and methods. Twelve girls (mean age 7.3 years) with central precocious puberty were prospectively enrolled in our study protocol. Sagittal and coronal MR images of the pituitary region were obtained in all patients before treatment and after at least 6 months of GnRH analogue therapy (mean 18.0 months). Parameters measured included pituitary gland height, length, width, sagittal cross-sectional area, and volume. Results. All patients had excellent clinical response to treatment with arrest of secondary sexual development, normalization of serum estradiol levels, and complete obliteration of the LH response to diagnostic GnRH stimulation. No significant change occurred in any pituitary size or shape parameter following GnRH analogue therapy. Conclusion. Favorable clinical response to GnRH analogue therapy in central precocious puberty is not accompanied by significant a change in pituitary gland size and shape. (orig.)

  15. Prospective assessment of pituitary size and shape on MR imaging after suppressive hormonal therapy in central precocious puberty

    International Nuclear Information System (INIS)

    Beek, J.T. van; Sharafuddin, M.J.A.; Kao, S.C.S.; Luisiri, A.; Garibaldi, L.R.

    2000-01-01

    Objective. The diagnostic significance of an enlarged pituitary gland regarding both shape and size parameters on MR imaging has previously been demonstrated in children with central precocious puberty. This study was designed to assess changes in these parameters following successful suppressive therapy of central precocious puberty with the gonadotropin-releasing hormone (GnRH) analogue. Materials and methods. Twelve girls (mean age 7.3 years) with central precocious puberty were prospectively enrolled in our study protocol. Sagittal and coronal MR images of the pituitary region were obtained in all patients before treatment and after at least 6 months of GnRH analogue therapy (mean 18.0 months). Parameters measured included pituitary gland height, length, width, sagittal cross-sectional area, and volume. Results. All patients had excellent clinical response to treatment with arrest of secondary sexual development, normalization of serum estradiol levels, and complete obliteration of the LH response to diagnostic GnRH stimulation. No significant change occurred in any pituitary size or shape parameter following GnRH analogue therapy. Conclusion. Favorable clinical response to GnRH analogue therapy in central precocious puberty is not accompanied by significant a change in pituitary gland size and shape. (orig.)

  16. Genetics Home Reference: familial male-limited precocious puberty

    Science.gov (United States)

    ... male-limited precocious puberty Familial male-limited precocious puberty Printable PDF Open All Close All Enable Javascript ... expand/collapse boxes. Description Familial male-limited precocious puberty is a condition that causes early sexual development ...

  17. True precocious puberty following treatment of a Leydig cell tumour: two case reports and literature review

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    Alberto eVerrotti

    2015-11-01

    Full Text Available Leydig cell testicular tumours are a rare cause of precocious pseudopuberty in boys. Surgery is the main therapy and shows good overall prognosis. The physical signs of precocious puberty are expected to disappear shortly after surgical removal of the mass. We report two children, 7.5 and 7.7 year-old boys, who underwent testis-sparing surgery for a Leydig cell testicular tumour causing precocious pseudopuberty. During follow-up, after an immediate clinical and laboratory regression, both boys presented signs of precocious puberty and ultimately developed central precocious puberty. They were successfully treated with gonadotropin releasing hormone analogues. Only 6 other cases have been described regarding the development of central precocious puberty after successful treatment of a Leydig cell tumour causing precocious pseudo puberty. Gonadotropin-dependent precocious puberty should be considered in children treated for a Leydig cell tumour presenting persistent or recurrent physical signs of puberty activation. In such cases, therapy with gonadotropin releasing hormone analogues appears to be the most effective medical treatment.

  18. Association of aromatase (TTTA)n repeat polymorphisms with central precocious puberty in girls.

    Science.gov (United States)

    Lee, Hae Sang; Kim, Kyung Hee; Hwang, Jin Soon

    2014-09-01

    Precocious puberty is characterized by early activation of the pituitary-gonadal axis. Oestrogen is the final key factor to start the onset of puberty. The cytochrome P450 19A1 (CYP19A1) gene encodes an aromatase that is responsible for the conversion of androgens to oestrogen, which is a key step in oestrogen biosynthesis. The aim of this study was to identify CYP19A1 gene mutations or polymorphisms in girls with central precocious puberty (CPP). We evaluated the frequency of allelic variants of the CYP19A1 exons and the tetranucleotide tandem repeat (TTTA)n in intron 4 in 203 idiopathic central precocious puberty (CPP) girls and 101 normal healthy women. The genotype analysis of the CYP19A1 (TTTA)n polymorphism revealed six different alleles ranging from seven to 13 repeats. Among the six different repeat alleles detected in this study, the (TTTA)₁₃ repeat allele was only detected in the patient group and carriers of the (TTTA)₁₃ allele were significantly associated with an increased risk of CPP (OR = 1·509, 95% CI = 1·425-1·598, P = 0·033). Carriers of the (TTTA)₁₃ repeat allele were significantly younger at pubertal onset and had higher levels of oestrogen than noncarriers of the (TTTA)₁₃ repeat allele. Although nine polymorphisms were detected in exons of the CYP19A1 gene, no clinical significance was observed. In this study, carriers of a higher repeat (TTTA)₁₃ polymorphism in intron 4 of the CYP19A1 gene had higher levels of oestrogen. Those carrying the (TTTA)₁₃ repeat allele may have a higher risk of developing CPP. © 2014 John Wiley & Sons Ltd.

  19. Final height in central precocious puberty after long term treatment with a slow release GnRH agonist

    NARCIS (Netherlands)

    Oostdijk, W; Rikken, B; Schreuder, S; Otten, Barto; Odink, R; Rouwe, C; Jansen, M; Gerver, WJ; Waelkens, J; Drop, S

    1996-01-01

    Objective-To study the resumption of puberty and the final height achieved in children with central precocious puberty (CPP) treated with the GnRH agonist triptorelin. Patients-31 girls and five boys with CPP who were treated with triptorelin 3.75 mg intramuscularly every four weeks. Girls were

  20. Insulin sensitivity and lipid profiles in girls with central precocious puberty before and during gonadal suppression

    DEFF Research Database (Denmark)

    Sørensen, Kaspar; Mouritsen, Annette; Mogensen, Signe Sloth

    2010-01-01

    Early menarche is associated with increased risk of cardiovascular disease in adulthood. It is unknown whether metabolic risk factors are adversely affected in girls with central precocious puberty (CPP) already at time of diagnosis....

  1. Hypothalamic hamartoma associated with precocious puberty: Case report

    International Nuclear Information System (INIS)

    Bae, Won Kyong; Kim, Pyo Nuyn; Kim, Il Young; Lee, Byoung Ho; Lee, Kyeong Seok; Bae, Hack Gun; Yun, Il Gyu

    1989-01-01

    Hamartoma of the hypothalamic area is a well recognized cause of central precocious puberty. We report a case of histologically proven hypothalamic hamartoma in a 8 year old girl with precocious puberty. The CT showed an isodense, nonenhancing mass in suprasellar area, measuring 4.2 X 3.1 cm, which, to our knowledge, seems to be the largest one of the published cases. On MR imaging, the signal intensity of the mass was homogeneous and isointense relative to gray matter on T1-, and hyperintense on T2-weighted images. The clinical and radiologic findings of the published cases of hypothalamic hamartoma are reviewed

  2. Hypothalamic hamartoma associated with precocious puberty: Case report

    Energy Technology Data Exchange (ETDEWEB)

    Bae, Won Kyong; Kim, Pyo Nuyn; Kim, Il Young; Lee, Byoung Ho; Lee, Kyeong Seok; Bae, Hack Gun; Yun, Il Gyu [Soonchunhyang University, Chonan Hospital, Chonan (Korea, Republic of)

    1989-12-15

    Hamartoma of the hypothalamic area is a well recognized cause of central precocious puberty. We report a case of histologically proven hypothalamic hamartoma in a 8 year old girl with precocious puberty. The CT showed an isodense, nonenhancing mass in suprasellar area, measuring 4.2 X 3.1 cm, which, to our knowledge, seems to be the largest one of the published cases. On MR imaging, the signal intensity of the mass was homogeneous and isointense relative to gray matter on T1-, and hyperintense on T2-weighted images. The clinical and radiologic findings of the published cases of hypothalamic hamartoma are reviewed.

  3. PRECOCIOUS PUBERTY DUE TO OVARIAN CYST – CASE REPORT

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    Teresa M Guimarães

    2017-01-01

    Discussion/Conclusion: Most autonomous ovarian cysts regress spontaneously with regression of pubertal signs, as in the present case. Therapy with a GnRH agonist may become necessary in the case of transformation from precocious pseudopuberty to central precocious puberty after recurrences of the ovarian cysts or when there is significant loss of height potential.

  4. [Precocious puberty and von Recklinghausen's disease].

    Science.gov (United States)

    Barg, Ewa; Wikiera, Beata; Basiak, Aleksander; Głab, Ewa

    2006-01-01

    Von Recklinghausen's disease belongs to a group of neurocutaneous syndromes and is characterised by skin, nerve and bone abnormalities. We present a case of von Recklinghausen's disease and precocious puberty in 7-year-old boy. At the age of three café au lait spots on the skin and an incranial tumour situated near the optic chiasm--qualified as inoperable--were discovered. At the age of 7 first signs of precocious puberty appeared (pubic hair P3 and enlargement of the testes (15 ml) and penis). Laboratory measurements included: LH 7.5 mIU/ml, FSH 1.1 mIU/ml, testosterone 183 ng/ml, assessment of bone age: 9 years. The response to LHRH stimulation was characteristic for true precocious puberty (LH 15.9 mIU/ml and FSH 1.5 mIU/ml after 30 minutes). The MRI of the brain showed a tumour of the suprasellar region with compression of pituitary stalk. True precocious puberty was diagnosed. Treatment with Diphereline was introduced. At present the boy is 9 years old and has been treated with Diphereline for 16 months. The volume of the testicles has decreased to 7 ml and loss of pubic hair was noted. The MRI does not show any progression in tumour growth. The authors would like to underline the need of close observation of children with von Reclinghausen disease with regard to possibility of uncovering true precocious puberty which is critical for rapid diagnosis and introduction of correct treatment.

  5. Final height after gonadotrophin releasing hormone agonist treatment for central precocious puberty : The Dutch experience

    NARCIS (Netherlands)

    Mul, D; Oostdijk, W; Otten, BJ; Rouwe, C; Jansen, M; Delemarre-van de Waal, HA; Waelkens, JJJ; Drop, SLS

    Final height (FH) data of 96 children (87 girls) treated with GnRH agonist for central precocious puberty were studied. In girls mean FH exceeded initial height prediction by 7.4 (5.7) cm (p <0.001); FH was significantly lower than target height, but still in the genetic target range. When treatment

  6. A case of late presentation of precocious puberty due to pituitary astrocytoma

    OpenAIRE

    Fahimeh Soheilipour; Hossein Ghalaenov; Seyyed-Hossein Samedanifard; Fatemeh Jesmi

    2015-01-01

    The importance of assessing precocious puberty, especially in boys, is not only due to the great complications it has for the affected patients, but also to the fatal underlying diseases. Therefore, children with central precocious puberty should first undergo neuroimaging. In this case study, we present a 9.5-year-old boy who was referred to Rasoul-e-Akram Medical Center with increased intracranial pressure, nausea/vomiting, and severe headache having begun three months earlier. ...

  7. Serum insulin-like growth factor I (IGF-I) and IGF-binding protein 3 levels are increased in central precocious puberty

    DEFF Research Database (Denmark)

    Juul, A; Scheike, Thomas Harder; Nielsen, C T

    1995-01-01

    Central precocious puberty (CPP) is characterized by early activation of the pituitary-gonadal axis, which leads to increased growth velocity and development of secondary sexual characteristics. It is generally believed that gonadal sex steroids stimulate pulsatile GH secretion, which, in turn......, stimulates insulin-like growth factor I (IGF-I) and IGF-binding protein 3 (IGFBP-3) production. However, little is known about GH, IGF-I, and IGFBP-3 serum levels in children with precocious puberty. Treatment of CPP by GnRH agonists has become the treatment of choice. However, the effect of long term...

  8. Ussefulnes of imaging techniques in the diagnostics of precocious puberty in boys

    International Nuclear Information System (INIS)

    Jakubowska, Anna; Grajewska-Ferens, Magdalena; Brzewski, Michał; Sopyło, Barbara

    2011-01-01

    Precocious puberty (PP) is defined as the appearance of symptoms of puberty in girls before 8 years of age and in boys under 9. Statistically, it occurs much more frequently in girls, while it is a rare pathology in boys. Over the period of 10 years, between 1999 and 2009, 39 girls and 17 boys aged 18 months – 9 years were diagnosed with precocious puberty,, and treated at the Endocrinology Clinic. The following tests were performed in all children: physical and anthropometric examinations, abdominal ultrasound scan (US) with evaluation of adrenal glands, examination of testes in boys or breasts and pelvic organs in girls, evaluation of skeletal age and, in selected cases, CT scans of the abdomen, MRI of the CNS, and hormonal laboratory tests. In the group of 17 boys the findings included: gonadotropin –dependent central puberty in 6 boys: idiopathic in 5 cases, and 1 case of a brain tumor – astrocytoma. Gonadotropin-independent precocious pseudopuberty was diagnosed in 11 boys: congenital adrenal hyperplasia in 5; in 1case – hyperandrogenism caused by overactivity of 5-α reductase; in 2 subjects – adrenal adenoma; in 2 boys adrenocortical carcinoma was diagnosed and Leydig cell tumor of testis in 1. 1. Precocious puberty occurs less often in boys, but in our population it was found in 17 boys of 56 treated children, which constituted as much as 30%. 2. Precocious pseudopuberty was found in 64% of the boys with PP. 3. Adrenal and testicular tumors were the causes of precocious puberty in the youngest group of boys aged 18 months – 6 years

  9. Treatment of central precocious puberty by subcutaneous injections of leuprorelin 3-month depot (11.25 mg).

    Science.gov (United States)

    Carel, Jean-Claude; Lahlou, Najiba; Jaramillo, Orlando; Montauban, Vincent; Teinturier, Cécile; Colle, Michel; Lucas, Christel; Chaussain, Jean Louis

    2002-09-01

    Depot GnRH agonists are widely used for the treatment of precocious puberty. Leuprorelin 3-month depot is currently used in adults but has not been evaluated in children. We evaluated the efficacy of this new formulation (11.25 mg every 3 months), for the suppression of gonadotropic activation and pubertal signs in children with central precocious puberty. We included 44 children (40 girls) with early-onset pubertal development in a 6-month open trial. The inclusion criteria were clinical pubertal development before the age of 8 (girls) or 10 (boys), advanced bone age, enlarged uterus (>36 mm), testosterone more than 1.7 nmol/liter (boys), and pubertal response of LH to GnRH (peak >5 IU/liter). The principal criterion for efficacy assessment, GnRH-stimulated LH peak less than 3 IU/liter, was met in 81 of 85 (95%) of the tests performed at months 3 and 6. The remaining four values were slightly above the threshold. The levels of sex steroids were also significantly reduced and clinical pubertal development was arrested. Plasma leuprorelin levels, measured every 30 d, were essentially stable after d 60. Local intolerance was noted after 10 of 86 injections (12%), and was mild in four cases, moderate in five cases, and severe in one. Among these 10 events, 4 consisted in local pain at injection's site. In conclusion, leuprorelin 3-month depot efficiently inhibits the gonadotropic axis in 95% of children with central precocious puberty studied for a 6-month period. This regimen allows the reduction of the number of yearly injections from 12 to 4.

  10. Precocious Puberty (For Parents)

    Science.gov (United States)

    ... spurt" start of menstruation (her period) acne "mature" body odor In boys, the signs of precocious puberty before ... growth — a growth "spurt" voice deepening acne "mature" body odor Many kids who show some of the early ...

  11. The Diagnostic Value of Pelvic Ultrasound in Girls with Central Precocious Puberty.

    Science.gov (United States)

    Lee, Sang Heon; Joo, Eun Young; Lee, Ji-Eun; Jun, Yong-Hoon; Kim, Mi-Young

    2016-01-01

    The gonadotropin-releasing hormone (GnRH) stimulation test is the gold standard for differentiating central precocious puberty (CPP) from exaggerated thelarche (ET). Because of this test's limitations, previous studies have clarified the clinical and laboratory factors that predict CPP. The present study investigated the early diagnostic significance of pelvic ultrasound in girls with CPP. The GnRH stimulation test and pelvic ultrasound were performed between March 2007 and February 2015 in 192 girls (aged values in pelvic ultrasound for differentiating between CPP and ET. Pelvic ultrasound should be combined with clinical and laboratory tests to maximize its diagnostic value for CPP.

  12. Experience with the once-yearly histrelin (GnRHa subcutaneous implant in the treatment of central precocious puberty

    Directory of Open Access Journals (Sweden)

    Katherine A Lewis

    2008-12-01

    Full Text Available Katherine A Lewis, Erica A EugsterDepartment of Pediatrics, Indiana University School of Medicine, Riley Hospital for Children, Indianapolis, USAAbstract: In 2007, a hydrogel histrelin implant was approved for the treatment of children with central precocious puberty (CPP. Children with CPP commonly have reduced height potential due to premature closure of the epiphyseal growth plates from exposure to sex steroids. Gonadotropin-releasing hormone analog (GnRHa treatment halts puberty and allows for improvement of adult height. A hydrogel implant delivery system utilizing the potent GnRHa, histrelin, was first developed for use in men with prostate cancer. A once yearly histrelin subcutaneous implant was subsequently developed for the treatment of children with CPP. Studies to date have demonstrated safety, tolerability, and effectiveness of this treatment option in patients treated up to 2 years. The most common adverse effects of the implant relate to implant site pain or bruising. Cost of this treatment seems comparable to somewhat higher than the commonly used GnRHa treatment option, depot leuprolide. While long term studies are needed to establish continued efficacy and safety beyond 2 years of treatment, the histrelin implant appears to be an attractive option for GnRHa treatment in patients with CPP.Keywords: central precocious puberty, histrelin, implant, gonadotropin-releasing-hormone analogs

  13. Serum IGF1 and insulin levels in girls with normal and precocious puberty

    DEFF Research Database (Denmark)

    Sørensen, Kaspar; Aksglaede, Lise; Petersen, Jørgen Holm

    2012-01-01

    IGF1 plays an important role in growth and metabolism during puberty. IGF1 levels are increased in girls with central precocious puberty (CPP). However, the relationship with insulin before and during gonadal suppression is unknown. In addition, the influence of the exon 3-deleted GH receptor gene...

  14. Central precocious puberty in a 3 year-old girl with Phenylketonuria: a rare association?

    Science.gov (United States)

    2014-01-01

    Background Central precocious puberty (CPP) and phenylketonuria (PKU) are two rare conditions, the latter being the rarer. To date, only one case featuring both these conditions has been reported, and hyperphenylalaninemia was assumed triggering CPP. Case presentation We present a 3.2 years old girl referred with a 12 months history of breast and pubic hair development, and vaginal discharge. Hyperphenylalaninemia had been identified by newborn screening and PKU subsequently confirmed by plasma amino acid and genetic analysis. Early dietary control of plasma phenylalanine had been excellent afterwards, resulting in phenylalanine concentrations consistently within the recommended range. Clinical scenario, hormonal assessment and imaging were in keeping with true idiopathic central precocious puberty. Treatment with long lasting gonadotropin-releasing hormone analogue led to regression of secondary sexual characteristics. Conclusion We describe for the first time CPP in a girl affected with PKU but with persistently well controlled blood phenylalanine concentrations. This finding is in contrast to a previous report which suggested persistently high phenylalaninemia levels as potential trigger for CPP in PKU patients. Our report, together with the lack of evidence in published cohort studies of children with PKU, strongly suggests this rare association is coincidental and independent of the presence of severe hyperphenylalaninemia. PMID:24773629

  15. A missense mutation in MKRN3 in a Danish girl with central precocious puberty and her brother with early puberty

    DEFF Research Database (Denmark)

    Känsäkoski, Johanna; Raivio, Taneli; Juul, Anders

    2015-01-01

    BACKGROUND: Idiopathic central precocious puberty (ICPP) results from the premature reactivation of the hypothalamic-pituitary-gonadal axis leading to development of secondary sexual characteristics prior to 8 y in girls or 9 y in boys. Since the initial discovery of mutations in the maternally...... hypothalamic complementary DNA (cDNA) was investigated by PCR. RESULTS: One paternally inherited rare variant, c.1034G>A (p.Arg345His), was identified in one girl with ICPP and in her brother with early puberty. The variant is predicted to be deleterious by three different in silico prediction programs....... Expression of MKRN3 was confirmed in adult human hypothalamus. CONCLUSION: Our results are in line with previous studies in which paternally inherited MKRN3 mutations have been found both in males and in females with ICPP or early puberty. Our report further expands the set of MKRN3 mutations identified...

  16. A novel MKRN3 missense mutation causing familial precocious puberty.

    Science.gov (United States)

    de Vries, L; Gat-Yablonski, G; Dror, N; Singer, A; Phillip, M

    2014-12-01

    Central precocious puberty may be familial in about a quarter of the idiopathic cases. However, little is known about the genetic causes responsible for the disorder. In this report we describe a family with central precocious puberty associated with a mutation in the makorin RING-finger protein 3 (MKRN3) gene. A novel missense mutation (p.H420Q) in the imprinted MKRN3 gene was identified in the four affected siblings, in their unaffected father and in his affected mother. An in silico mutant MKRN3 model predicts that the mutation p.H420Q leads to reduced zinc binding and, subsequently, impaired RNA binding. These findings support the fundamental role of the MKRN3 protein in determining pubertal timing. © The Author 2014. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  17. Virilizing Adrenocortical Carcinoma Advancing to Central Precocious Puberty after Surgery

    OpenAIRE

    Kim, Min Sun; Yang, Eu Jeen; Cho, Dong Hyu; Hwang, Pyung Han; Lee, Dae-Yeol

    2015-01-01

    Adrenocortical carcinoma (ACC) in pediatric and adolescent patients is rare, and it is associated with various clinical symptoms. We introduce the case of an 8-year-old boy with ACC who presented with peripheral precocious puberty at his first visit. He displayed penis enlargement with pubic hair and facial acne. His serum adrenal androgen levels were elevated, and abdominal computed tomography revealed a right suprarenal mass. After complete surgical resection, the histological diagnosis was...

  18. Boy with central precocious puberty probably due to a peripheral cause.

    Science.gov (United States)

    Sahana, Pranab Kumar; Gopal Sankar, Krishna Shankar; Sengupta, Nilanjan; Chattopadhyay, Kaustubh

    2016-06-02

    A 6½ years Indian boy was brought by his parents, who were anxious about the excessive increase in the size of the boy's phallus, from the age of 2 years. On physical examination, the child had a penis length greater than the 97th centile for age, a sexual maturity rating of gonads at stage 2 and pubic hair at stage 3, with height in the high normal range (90-97th centile). The bone age was 12 years. Laboratory evaluation showed pubertal levels of testosterone and pubertal gonadotropin response to stimulation, confirming central precocious puberty (CPP). Incidentally, the hormonal profile also suggested congenital adrenal hyperplasia (CAH). This case report depicts a case of CPP probably caused by CAH in boys, which is rare. 2016 BMJ Publishing Group Ltd.

  19. A case of late presentation of precocious puberty due to pituitary astrocytoma

    Directory of Open Access Journals (Sweden)

    Fahimeh Soheilipour

    2015-08-01

    Full Text Available The importance of assessing precocious puberty, especially in boys, is not only due to the great complications it has for the affected patients, but also to the fatal underlying diseases. Therefore, children with central precocious puberty should first undergo neuroimaging. In this case study, we present a 9.5-year-old boy who was referred to Rasoul-e-Akram Medical Center with increased intracranial pressure, nausea/vomiting, and severe headache having begun three months earlier. The development of secondary sexual changes had started two years earlier, and had been neglected. His testes, penis, and pubic hair were at the fourth Tanner stage. He had elevated luteinizing and follicle stimulating hormones. Microscopic evaluation confirmed low-grade pilocytic astrocytoma WHO grade 1. Emergency brain surgery was conducted in which the brain was decompressed, and chemotherapy was started postoperatively. Two years after the surgery, he remains under chemotherapy, with obvious sexual maturation and a height of 154 cm. Training families and medical staff efficiently can help prevent the late diagnosis and treatment of precocious puberty and, as a result, help patients in their social life.

  20. MR imaging of the pituitary gland in central precocious puberty

    International Nuclear Information System (INIS)

    Kao, S.C.S.; Cook, J.S.; Hansen, J.R.; Simonson, T.M.

    1992-01-01

    Cranial magnetic resonance imaging was performed in 17 children with central precocious puberty (CPP) and 19 aged-matched controls to compare the appearance of the pituitary gland. Gland size was measured on T1-weighted sagittal and coronal images. The gland was graded according to the concavity or convexity of the upper surface, and the signal intensity of the gland was assessed visually. The mean pituitary volume in 13 CPP children without hypothalamic tumor (292.6 mm 3 ) was significantly greater than that in normal controls (181.35 mm 3 ). The mean volume for the four CPP children with hypothalamic tumor was smaller (145.0 mm 3 ). Compared to controls, the upper pituitary surface in CPP patients appeared convex in a higher proportion. The anterior pituitary was isointense to pons in all patients and controls. Although the posterior pituitary bright spot was present in 14 controls and 11 CPP patients, none with hypothalamic tumor showed it. (orig.)

  1. MR imaging of the pituitary gland in central precocious puberty

    Energy Technology Data Exchange (ETDEWEB)

    Kao, S.C.S. (Dept. of Radiology, Univ. of Iowa Coll. of Medicine, Iowa City, IA (United States)); Cook, J.S. (Dept. of Pediatrics, Univ. of Iowa Coll. of Medicine, Iowa City, IA (United States)); Hansen, J.R. (Dept. of Pediatrics, Univ. of Iowa Coll. of Medicine, Iowa City, IA (United States)); Simonson, T.M. (Dept. of Radiology, Univ. of Iowa Coll. of Medicine, Iowa City, IA (United States))

    1992-11-01

    Cranial magnetic resonance imaging was performed in 17 children with central precocious puberty (CPP) and 19 aged-matched controls to compare the appearance of the pituitary gland. Gland size was measured on T1-weighted sagittal and coronal images. The gland was graded according to the concavity or convexity of the upper surface, and the signal intensity of the gland was assessed visually. The mean pituitary volume in 13 CPP children without hypothalamic tumor (292.6 mm[sup 3]) was significantly greater than that in normal controls (181.35 mm[sup 3]). The mean volume for the four CPP children with hypothalamic tumor was smaller (145.0 mm[sup 3]). Compared to controls, the upper pituitary surface in CPP patients appeared convex in a higher proportion. The anterior pituitary was isointense to pons in all patients and controls. Although the posterior pituitary bright spot was present in 14 controls and 11 CPP patients, none with hypothalamic tumor showed it. (orig.)

  2. Study on the relationship between serum E2, FSH, LH levels and morphologic changes of uterus and ovary in girls with idiopathic central precocious puberty

    International Nuclear Information System (INIS)

    Li Jingsong; Du Xueliang; Fu Hongliang; Wu Zhen; Gu Rong; Feng Guoqiang; Wu Jingchuan

    2003-01-01

    Objective: To explore the characteristics of the girls with idiopathic central precocious puberty (ICPP) through study on the relationship between serum E 2 , FSH, LH levels and morphologic changes of uterus and ovary. Methods: Serum E 2 , FSH and LH levels were measured with ECLIA and morphologic changes of uterus and ovary were studied with B-US in 67 girls with idiopathic central precocious puberty. Results: 1) Among the three types of ovaries (type 1, homogeneous type; type 2, small follicular type; type 3, large follicular type), differences of the serum LH and E 2 values were significant (p 2 levels (p 2 levels were correlated to the maximal follicular diameter but not to the total volume of ovary. It proved that there was close relationship between LH levels and follicular development. It also proved that serum E 2 levels was mainly decided by the development status of the follicles irrespective the total ovary volume. 2) Volume of uterus was correlated to both LH and E 2 levels. Development of uterus was significantly estrogen-dependent. 3) Judgement based upon observations on measurement of serum E 2 , LH, FSH levels and morphologic changes of uterus and ovary would be crucial for establishing the diagnosis of idiopathic central precocious puberty

  3. Serum insulin-like growth factor I (IGF-I) and IGF-binding protein 3 levels are increased in central precocious puberty

    DEFF Research Database (Denmark)

    Juul, A; Scheike, Thomas Harder; Nielsen, C T

    1995-01-01

    between IGF-I and IGFBP-3 (i.e. free biologically active IGF-I) declined concomitantly with a decrease in growth velocity. Serum levels of IGF-I and IGFBP-3 (expressed as the SD score for bone age), but not those of estradiol, correlated with height velocity before and during treatment (r = 0.34; P ...Central precocious puberty (CPP) is characterized by early activation of the pituitary-gonadal axis, which leads to increased growth velocity and development of secondary sexual characteristics. It is generally believed that gonadal sex steroids stimulate pulsatile GH secretion, which, in turn......, stimulates insulin-like growth factor I (IGF-I) and IGF-binding protein 3 (IGFBP-3) production. However, little is known about GH, IGF-I, and IGFBP-3 serum levels in children with precocious puberty. Treatment of CPP by GnRH agonists has become the treatment of choice. However, the effect of long term...

  4. A single sample GnRHa stimulation test in the diagnosis of precocious puberty

    Science.gov (United States)

    Gonadotropin-releasing hormone (GnRH) has been the standard test for diagnosing central precocious puberty. Because GnRH is no longer available, GnRH analogues (GnRHa) are now used. Random LH concentration, measured by the third-generation immunochemiluminometric assay, is a useful screening tool ...

  5. Leuprolide Acetate 1-Month Depot for Central Precocious Puberty: Hormonal Suppression and Recovery

    Directory of Open Access Journals (Sweden)

    Neely EKirk

    2011-01-01

    Full Text Available Methods. This prospective US multicenter trial of leuprolide acetate 1-month depot (7.5–15 mg for central precocious puberty utilized an open-label treatment period, long-term follow-up, and adult callback. Forty-nine females Results. Subjects were treated for years. Mean peak GnRH-stimulated LH and FSH were prepubertal after the first dose and remained suppressed throughout treatment. During treatment, mean estradiol decreased to the limit of detection and mean testosterone decreased but remained above prepubertal norms. During posttreatment follow-up ( years, all patients achieved a pubertal hormonal response within 1 year and menses were reported in all females ≥12 years old. No impairment of reproductive function was observed at adulthood (mean age: 24.8 years.

  6. Serum levels of growth hormone binding protein in children with normal and precocious puberty

    DEFF Research Database (Denmark)

    Juul, A; Fisker, Sidse; Scheike, Thomas Harder

    2000-01-01

    To study the regulation of GHBP serum levels by gonadal steroids in normal and precocious puberty.......To study the regulation of GHBP serum levels by gonadal steroids in normal and precocious puberty....

  7. Increased risk of precocious puberty in internationally adopted children in Denmark

    DEFF Research Database (Denmark)

    Teilmann, G.; Pedersen, Carsten Bøcker; Skakkebæk, N.E.

    2006-01-01

    settings from birth to adoption, whereas most other countries are reported to take care of the children in orphanages before adoption. It can only be speculated whether a relation between preadoption living conditions and later risk of precocious puberty exists. Genetic factors play a key role...... identified through the unique Danish Civil Registration System and subsequently categorized as being Danish (N = 1,062,333), adopted (N = 10,997), immigrating with their family (N = 72,181), or being descendants of immigrants (N = 128,152). The incidence rate ratio of precocious puberty was estimated by log......-linear Poisson regression. All rate ratios were adjusted for age and its interaction with gender and calendar year. P values were based on likelihood ratio tests, and 95% confidence intervals were calculated by Wald's test. RESULTS: In the study period, 655 children developed precocious puberty during 5...

  8. A missense mutation in MKRN3 in a Danish girl with central precocious puberty and her brother with early puberty.

    Science.gov (United States)

    Känsäkoski, Johanna; Raivio, Taneli; Juul, Anders; Tommiska, Johanna

    2015-12-01

    Idiopathic central precocious puberty (ICPP) results from the premature reactivation of the hypothalamic-pituitary-gonadal axis leading to development of secondary sexual characteristics prior to 8 y in girls or 9 y in boys. Since the initial discovery of mutations in the maternally imprinted MKRN3 gene in 2013, several case reports have described mutations in this gene in ICPP patients from different populations, highlighting the importance of MKRN3 as a regulator of pubertal onset. We screened 29 Danish girls with ICPP for mutations in MKRN3. Expression of MKRN3 in human hypothalamic complementary DNA (cDNA) was investigated by PCR. One paternally inherited rare variant, c.1034G>A (p.Arg345His), was identified in one girl with ICPP and in her brother with early puberty. The variant is predicted to be deleterious by three different in silico prediction programs. Expression of MKRN3 was confirmed in adult human hypothalamus. Our results are in line with previous studies in which paternally inherited MKRN3 mutations have been found both in males and in females with ICPP or early puberty. Our report further expands the set of MKRN3 mutations identified in ICPP patients across diverse populations, thus supporting the major regulatory function of MKRN3 in pubertal onset.

  9. Serum inhibin A and inhibin B in central precocious puberty before and during treatment with GnRH agonists

    DEFF Research Database (Denmark)

    Sehested, A; Andersson, A M; Müller, J

    2000-01-01

    both gonadotropins and estradiol levels become suppressed. We therefore investigated serum levels of inhibin A and inhibin B in girls with CPP at diagnosis and during treatment in order to test the hypothesis that inhibin secretion would increase and decrease in parallel with the activation......Serum levels of the gonadal hormones inhibin A and inhibin B are undetectable or low in prepubertal girls, and rise during puberty. In girls with central precocious puberty (CPP) the hypothalamic-pituitary-gonadal axis is prematurely activated, if the girl is thereafter treated with GnRH agonists...... and suppression of the hypothalamic-pituitary-gonadal axis. Serum levels of inhibin A and inhibin B were significantly (p 0.0005) elevated in 42 girls at diagnosis of CPP (inhibin A: 7 pg/ml (...

  10. Hypothalamic hamartoma with precocious puberty: a case report.

    Science.gov (United States)

    Amin, M S; Kader, M A; Huq, F I; Khan, N A

    2012-07-01

    Hypothalamic hamartoma (HH) is one of the most important causes of central precocious puberty in male children. Hamartomas are malformations composed of ectopic gonadotropic hormone (GnRH) neurons which secrete pulsatile gonadotropin releasing hormone. They are generally observed in children under 3 years. A case of 11/3 year-old male child presented with premature development of secondary sexual characters i.e., growth of pubic and axillary hair, enlargement of penis and acne over the face for the last 5 months. On physical examination, his height was 1.02 m and his weight 18kg, enlarged penile length of which 58mm; testicles were enlarged in size right one measuring 32X25mm and the left 30X23mm. His hematological and other biochemical investigations revealed no abnormality. Plain radiographic examination revealed radiological bone age of about 8-9 years. Endocrinological findings were as follows: Follicle stimulating hormone (FSH): 1.5mIU/ml, Luteinizing hormone (LH): 9.1mIU/ml, Testosterone: 701ng/dl (Testosterone level less than 30ng/dl in prepubertal age). Thyroid function tests were normal. Patient showed no adrenal pathology on ultrasound and his testicular parenchyma was homogeneous echotexture with the size of 30X22X16mm on the right (volume 5.4ml) and 30X20X15mm on the left (volume 4.6ml). With above physical & endocrinological findings and age of the child, it was suspected as a case of central precocious puberty. Subsequently MR imaging of the brain done & showed an oval non-enhancing pedunculated hypothalamic mass arising from the tubercinereum that was iso to hypointense to brain parenchyma on T1 - and intermediate signal on T2-weighted images, 20X10X10mm in diameter, extending into suprasellar cistern. During follow up after 06 months of starting conservative medication with gonadotropin-releasing hormone (GnRH) analog (Leuprolide acetate), his progression of puberty has been arrested and the testosterone level 18ng/dl, which is normal for his age.

  11. Premature pubarche before one year of age: distinguishing between mini-puberty variants and precocious puberty.

    Science.gov (United States)

    Bourayou, Rafik; Giabicani, Eloïse; Pouillot, Monique; Brailly-Tabard, Sylvie; Brauner, Raja

    2015-04-02

    The aim of this study was to facilitate the distinction between the benign "mini-puberty of early infancy" and precocious puberty (PP). We compared 59 patients (21 boys and 38 girls) seen for pubic hair development before one year of age diagnosed as mini-puberty to 13 patients (2 boys) in whom pubertal development before one year revealed a PP. The boys with mini-puberty presented with pubic hair development and prepubertal testicular volume, with low plasma testosterone concentrations. Their gonadotropin responses to gonadotropin releasing hormone (GnRH) test showed predominant luteinising hormone increase in 9/13. The girls presented with pubic hair development that was accompanied by breast development in 47% of cases, with low plasma estradiol concentrations. Their gonadotropin responses showed predominant follicle-stimulating hormone increase in the 17 evaluated. The patients with PP had organic central PP (5 hypothalamic hamartoma) or idiopathic central PP (n=6), or peripheral PP (one ovarian tumor and one congenital adrenal hyperplasia). The diagnosis was challenging only in 3 girls with idiopathic central PP presenting with prepubertal plasma estradiol concentrations and responses to GnRH test. The diagnosis of PP was easily determined based on the clinical presentation and the pubertal concentrations of testosterone in boys or of estradiol in girls, as was the diagnosis of central or peripheral origin of PP based on gonadotropin response to the GnRH test. Once PP is excluded, these patients need careful follow-up and physician consultation is needed if clinical pubertal signs progress.

  12. Luteinizing hormone-releasing hormone analogue (Buserelin) treatment for central precocious puberty: a multi-centre trial.

    Science.gov (United States)

    Werther, G A; Warne, G L; Ennis, G; Gold, H; Silink, M; Cowell, C T; Quigley, C; Howard, N; Antony, G; Byrne, G C

    1990-02-01

    A multi-centre open trial of Buserelin, a luteinizing hormone-releasing hormone (LHRH) analogue, was conducted in 13 children with central precocious puberty. Eleven children (eight girls and three boys), aged 3.4-10.2 years at commencement, completed the required 12 month period of treatment. Initially all patients received the drug by intranasal spray in a dose of 1200 micrograms/day, but by the end of the 12 month period two were having daily subcutaneous injections and three were receiving an increased dose intranasally. The first month of treatment was associated in one boy with increased aggression and masturbation, and in the girls with an increase in the prevalence of vaginal bleeding. Thereafter, however, both behavioural abnormalities and menstruation were suppressed. Median bone age increased significantly during the study, but without any significant change in the ratio of height age to bone age. The median predicted adult height for the group therefore did not alter significantly over the twelve months of the study. Buserelin treatment caused a reduction in the peak luteinizing hormone and follicle-stimulating hormone (FSH) responses to LHRH, mostly to prepubertal levels, and also suppressed basal FSH. In the first weeks of treatment, the girls' serum oestradiol levels rose significantly and then fell to prepubertal or early pubertal levels. A similar pattern was seen for serum testosterone levels. Serum somatomedin-C levels, however, showed little fluctuation over the course of the study. Buserelin treatment was safe and well accepted, and offers the promise of improved linear growth potential in precocious puberty.

  13. Multicenter clinical trial of leuprolide acetate depot (Luphere depot 3.75 mg for efficacy and safety in girls with central precocious puberty

    Directory of Open Access Journals (Sweden)

    You Jin Kim

    2013-12-01

    Full Text Available PurposeWe evaluated the efficacy, safety and psychological aspect of monthly administrations of the gonadotropin-releasing hormone agonists (GnRHa, leuprolide acetate depot (Luphere depot 3.75 mg, in patients with precocious puberty.MethodsA total of 54 girls with central precocious puberty were administered with leuprolide acetate (Luphere depot 3.75 mg every four weeks over 24 weeks. We evaluated the percentage of children exhibiting a suppressed luteinizing hormone (LH response to GnRH (LH peak≤3 IU/L, peak LH/follicle stimulating hormone (FSH ratio of GnRH stimulation test less than 1, change in bone age/chronologic age ratio, change in the Tanner stage and change in eating habit and psychological aspect.Results(1 The percentage of children exhibiting a suppressed LH response to GnRH, defined as an LH peak≤3 IU/L at 24 weeks was 96.3 % (52/54. (2 The percentage of children exhibiting peak LH/FSH ratio<1 at 24 weeks of the study was 94.4 % (51/54. (3 The ratio of bone age and chronological age significantly declined from 1.27±0.07 to 1.24±0.01 after the 6 months of the study. (4 The mean Tanner stage manifested a significant change 2.3±0.48 at baseline, down to 1.70±0.61 at 24 weeks. (5 Based on the questionnaires, the score for eating habits showed a significant change from the baseline 34.0±6.8 to 31.3±6.8. (6 The psychological assessment did not exhibit a significant difference except with scores for sociability, problem behavior total score and other problems.ConclusionThe leuprolide 3.75 mg (Luphere depot is useful and safety for treating children with central precocious puberty.

  14. Diagnosis and constitutional and laboratory features of Korean girls referred for precocious puberty

    Directory of Open Access Journals (Sweden)

    Doosoo Kim

    2012-12-01

    Full Text Available &lt;B&gt;Purpose:&lt;/B&gt; Precocious puberty is defined as breast development before the age of 8 years in girls. The present study aimed to reveal the diagnosis of Korean girls referred for precocious puberty and to compare the constitutional and endocrinological features among diagnosis groups. &lt;B&gt;Methods:&lt;/B&gt; The present study used a retrospective chart review of 988 Korean girls who had visited a pediatric endocrinology clinic from 2006 to 2010 for the evaluation of precocious puberty. Study groups comprised fast puberty, true precocious puberty (PP, pseudo PP, premature thelarche, and control. We determined the height standard deviation score (HSDS, weight standard deviation score (WSDS, and body mass index standard deviation score (BMISDS of each group using the published 2007 Korean growth charts. Hormone tests were performed at our outpatient clinic. &lt;B&gt;Results:&lt;/B&gt; The PP groups comprised fast puberty (67%, premature thelarche (17%, true PP (15%, and pseudo PP (1%. Advanced bone age and levels of estradiol, basal luteinizing hormone (LH, and peak LH after gonadotropin-releasing hormone stimulation testing were significantly high in the fast puberty and true PP groups compared with the control group. HSDS, WSDS, and BMISDS were significantly higher in the true PP group than in the control group (P&lt;0.05. &lt;B&gt;Conclusion:&lt;/B&gt; The frequent causes of PP were found to be fast puberty, true PP, and premature thelarche. Furthermore, BMISDS were significantly elevated in the true PP group. Therefore, we emphasize the need for regular follow-up of girls who are heavier or taller than others in the same age group.

  15. Significant adverse reactions to long-acting gonadotropin-releasing hormone agonists for the treatment of central precocious puberty and early onset puberty

    Directory of Open Access Journals (Sweden)

    Ji Woo Lee

    2014-09-01

    Full Text Available PurposeLong-acting gonadotropin-releasing hormone agonists (GnRHa are commonly used to treat central precocious puberty (CPP in Korea. Although rare, there have been reports on the characteristic of adverse reactions of GnRHa in CPP among the Korean population. This study was intended to report on our clinical experience regarding significant adverse reactions to long-acting GnRHa in CPP and early onset puberty and to evaluate the prevalence rate of serious side effects.MethodsThis retrospective study included children with CPP and early onset puberty, who were administered monthly with long-acting GnRHa (leuprolide acetate, triptorelin acetate at the outpatient clinic of Department of Pediatrics, at Inha University Hospital, between January 2011 and December 2013. We analyzed the clinical characteristics of patients who experienced significant adverse reactions and evaluated the prevalence rate.ResultsSix serious side effects (0.9% were observed among total of 621 CPP and early onset puberty children with GnRHa therapy. The number of sterile abscess formation was four in three patients (4 events of 621. Anaphylaxis occurred in only one patient, and unilateral slipped capital femoral epiphysis (SCFE in another one patient. Anaphylaxis occurred after the 6th administration of the monthly depot triptorelin acetate. Unilateral SCFE developed in GnRHa therapy.ConclusionSterile abscess formation occurred in 0.6% of CPP and early onset puberty patients from the administration of a monthly depot GnRHa therapy. The occurrences of anaphylaxis and SCFE are extremely rare, but can have serious implications on patients. Clinicians should be aware of these potential adverse effects related to GnRHa therapy in CPP.

  16. Qualitative assessment of precocious puberty-related user-created contents on YouTube

    Directory of Open Access Journals (Sweden)

    Hyo-Kyoung Nam

    2015-09-01

    Full Text Available PurposeUser-created content (UCC has provided a considerable amount of medical information and become an important source. We aimed to evaluate the quality and scientific accuracy of precocious puberty-related UCC on YouTube.MethodsThe keywords "precocious puberty", "early puberty", "sexual precocity", and "precocity" were searched for on YouTube during June and July 2014. More than 1,500 UCC matched the keywords. According to the information provider, UCC was classified as medical, oriental, or commercial & others. We evaluated the quality and scientific accuracy of the information provided in UCC using the DISCERN instrument and information scores, respectively.ResultsWe selected 51 UCC, which were categorized into three types: medical (n=17, oriental (n=17, or commercial & others (n=17. The overall quality score for medical UCC (3.4 was significantly higher relative to those of oriental and commercial & others UCC (2.8 and 2.3, respectively (P<0.001. In the assessment of scientific accuracy, the mean information score for medical UCC (30.7 was significantly higher than those of oriental and commercial & others UCC (15.9 and 5.1, respectively (P<0.001. The mean duration of oriental UCC was the longest (P<0.001, however, it was viewed less frequently among them (P=0.086.ConclusionThe quality and accuracy of precocious puberty-related health information in UCC were variable and often unreliable. The overall quality of UCC regarding precocious puberty was moderate. Only medical UCC provided scientifically accurate information. As UCC becomes a popular source of health information, it is important to provide reliable, scientifically accurate information.

  17. [Diagnostic value of baseline serum luteinizing hormone level for central precocious puberty in girls].

    Science.gov (United States)

    Ou-Yang, Li-Xue; Yang, Fan

    2017-07-01

    To evaluate the diagnostic value of baseline serum luteinizing hormone (LH) level for central precocious puberty (CPP) in girls. A total of 279 girls with precocious puberty were subjected to assessment of growth and development, bone age determination, baseline LH test, and follicle-stimulating hormone (FSH) test, gonadotropin-releasing hormone stimulation test, and other related examinations. Of the 279 patients, 175 were diagnosed with CPP and 104 with premature thelarche (PT). The receiver operating characteristic (ROC) curve was used to evaluate the diagnostic value of baseline LH and FSH levels and their peak levels for CPP, and the correlation between the baseline LH level and the peak LH level was analyzed. The CPP group had significantly higher bone age, baseline LH and FSH levels, peak LH and FSH levels, and ratio of peak LH level to peak FSH level than the PT group (Pbaseline LH level and peak LH level had good diagnostic values for CPP. Among the three bone age subgroups in the CPP group (7.0-9.0 years, 9.0-11.0 years, and >11.0 years), baseline LH level showed the best diagnostic value in the >11.0 years subgroup, with the largest area under the ROC curve. At a baseline LH level of 0.45 IU/L, the Youden index reached the peak value, and the sensitivity and specificity were 66.7% and 80% respectively, for the diagnosis of CPP. At a peak LH level of 9.935 IU/L, the Youden index reached the peak value, and the sensitivity and specificity were 74.8% and 100% respectively, for the diagnosis of CPP. The baseline LH level was positively correlated with the peak LH level (r=0.440, PBaseline LH level can be used as an primary screening index for the diagnosis of CPP. It has a certain diagnostic value for CPP at different bone ages, and may be used as a monitoring index during the treatment and follow-uP.

  18. GnRH-dependent precocious puberty manifested at the age of 14 months in a girl with 47,XXX karyotype.

    Science.gov (United States)

    Skordis, Nicos; Ferrari, Eleana; Antoniadou, Aria; Phylactou, Leonidas A; Fanis, Pavlos; Neocleous, Vassos

    2017-07-01

    This case report describes a 47,XXX girl who presented very early, at the age of 14 months, with signs of sexual precocity (breast and pubic hair development, menarche) and was finally diagnosed with GnRH dependent precocious puberty with no evidence of underlying central nervous system pathology. Molecular testing did not identify any genetic defect in any of the genes tested (KISS1, KISS1R, DLK1 and the intronless MKRN3). Though previous studies have shown a link between karyotype 47,XXX and precocious puberty, this is the youngest patient reported so far. Treatment with GnRH analog was commenced and proved to be effective, indicating a successful suppression of the hypothalamic-pituitary-ovarian axis.

  19. Idiopathic precocious puberty in girls: Psychosexual development.

    Science.gov (United States)

    Meyer-Bahlburg, H F; Ehrhardt, A A; Bell, J J; Cohen, S F; Healey, J M; Feldman, J F; Morishima, A; Baker, S W; New, M I

    1985-08-01

    A promising model syndrome for the examination of the role of physical maturation in the development of female sexuality is idiopathic precocious puberty (IPP). In this first controlled study of psychosexual development in IPP females, 16 females between 13 and 20 years of age with a history of IPP were compared to 16 control subjects with a history of normal puberty pair-matched to the index subjects on the basis of sex, race, age, socioeconomic level, and menarcheal status. The psychosexual history and the current psychosexual status were assessed by a systematic half-structured interview. The IPP females on average passed the psychosexual milestones at an earlier age than their normal maturing peers, with a particularly early onset of masturbation. Those who were sociosexually active tended to report a higher total orgasmic outlet and a higher sex drive. There was no increase in homosexuality among IPP girls. The timing of puberty has a (modest) influence on psychosexual development in females.

  20. An 11-month-old girl with central precocious puberty caused by hypothalamic hamartoma

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    Da Young Yoon

    2016-12-01

    Full Text Available Central precocious puberty (CPP is caused by premature activation of the hypothalamic-gonadal axis, and must be treated adequately. In particular, CPP that occurs at a relatively young age or in boys is likely to be caused by an organic lesion. Hypothalamic hamartoma (HH is the most common organic cause of CPP. The present case report describes an 11-month-old female infant who presented with vaginal bleeding and rapidly progressive secondary sex characteristics from the age of 6 months. She was diagnosed with CPP following the detection of HH via magnetic resonance imaging. The infant girl was successfully treated with gonadotropin-releasing hormone agonist. After 6 months, her breast had regressed and clinical and radiological follow-up demonstrated stable findings with no evidence of tumor growth or secondary sexual characteristics until the fourth year after the initiation of treatment. This patient is the one of the youngest infants presenting with CPP and HH in Korea; treatment was successful over a relatively long follow-up period.

  1. Influence of GnRH analogue on body mass index in girls with precocious puberty: a prospective study

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    Heshmat Moaieri

    2014-06-01

    Conclusion: Gonadotropin-releasing hormone analog (GnRHa therapy in central precocious puberty (CPP is safe for BMI and increasing of BMI is not significant, long- term follow-up study is required to elucidate whether GnRHa treatment affects adult obesity. Using growth hormone concomitantly, the effect on increasing height is significant.

  2. Psychological assessment of mothers and their daughters at the time of diagnosis of precocious puberty.

    Science.gov (United States)

    Schoelwer, Melissa J; Donahue, Kelly L; Bryk, Kristina; Didrick, Paula; Berenbaum, Sheri A; Eugster, Erica A

    2015-01-01

    Concerns about psychological distress are often used to justify treatment of girls with precocious puberty, but there is little evidence to support these concerns. The extent to which psychological problems are associated with central precocious puberty (CPP) compared with other forms of early puberty in girls has likewise not been established. Girls presenting with untreated CPP, premature adrenarche (PA) or early normal puberty (ENP) were recruited from our pediatric endocrine clinic along with their mothers. Child psychological adjustment was assessed by child self-report and parent report. Parent self-reported personality, anxiety, and depression were also assessed. Differences between groups were explored using one-way ANOVA and Dunnett's T3 test. Sixty-two subjects (aged 7.5 ± 1.4 years, range 4.8-10.5) were enrolled, of whom 19 had CPP, 22 had PA, and 21 had ENP. Girls with ENP were significantly older (8.9 ± .9 years) than girls with CPP (6.9 ± 1.1 years, p psychological adjustment. However, mothers of girls with PA scored significantly higher than mothers of girls with ENP on one measure of depression (p = .04) and stress (p = .01). While mothers of girls with PA report increased psychological distress on some measures, no differences in psychological adjustment were found at baseline amongst the girls themselves. Whether these results will change as puberty progresses in the PA and ENP groups or with treatment of CPP is unknown. Long-term prospective studies are needed in order to further investigate psychological correlates of early puberty in girls.

  3. Herbal medicine for idiopathic central precocious puberty: A protocol for a systematic review of controlled trials.

    Science.gov (United States)

    Lee, Hye Lim; Lee, Yoo Been; Choi, Jun-Yong; Lee, Ju Ah

    2018-03-01

    Herbal medicine is widely used in East Asia to treat idiopathic central precocious puberty (ICPP). Most of the available clinical trials that investigated herbal medicine for ICPP have been included in this review. This systematic review will assess the efficacy and safety of herbal medicine for ICPP. Eleven databases, including Asian databases, will be searched for studies conducted through 2018. We will include randomized controlled trials assessing herbal medicine for ICPP. The risk of bias will be evaluated using the Cochrane risk of bias assessment tool, and confidence in the cumulative evidence will be evaluated using the Grading of Recommendations Assessment, Development, and Evaluation instrument. This systematic review will be published in a peer-reviewed journal and disseminated both electronically and in print. The review will be updated to inform and guide health care practices. PROSPER 2018 CRD42018087988.

  4. Longitudinal follow-up of bone density and body composition in children with precocious or early puberty before, during and after cessation of GnRH agonist therapy

    NARCIS (Netherlands)

    I.M. van der Sluis (Inge); A.M. Boot (Annemieke); E.P. Krenning (Eric); S.L.S. Drop (Stenvert); S.M.P.F. de Muinck Keizer-Schrama (Sabine)

    2002-01-01

    textabstractWe studied bone mineral density (BMD), bone metabolism, and body composition in 47 children with central precocious puberty (n = 36) or early puberty (n = 11) before, during, and after cessation of GnRH agonist. Bone density and body composition were measured with dual

  5. Advanced bone age as an indicator facilitates the diagnosis of precocious puberty

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    Yue-Qin Xu

    Full Text Available Abstract Objective: Diagnosis of central precocious puberty has always been challenging in clinical practice. As an important method in the diagnosis of central precocious puberty, luteinizing hormone-releasing hormone stimulation test is complex and time-consuming. In many cases, clinical traits are inconsistent with luteinizing hormone-releasing hormone stimulation test results, therefore not reliable for diagnosis. In this study, the authors intended to find an indicator that predicts the results of the luteinizing hormone-releasing hormone stimulation test among subjects with early pubertal signs. Methods: Cases of 382 girls with early breast development before 8 years old and luteinizing hormone-releasing hormone stimulation test before 9 years old were included and underwent follow-up tests. Patients with peak luteinizing hormone level ≥5 IU/L were considered positive in the luteinizing hormone-releasing hormone stimulation test. Anthropometric data, body mass index, bone age evaluation, blood hormones levels of luteinizing hormone, estradiol, follicle-stimulating hormone, and uterine and ovarian volumes were analyzed. Results: Subjects with positive results in the initial test demonstrated early bone maturation, accelerated growth, and elevated basal blood luteinizing hormone, estradiol, and follicle-stimulating hormone levels, when compared with subjects with negative results in the initial test. Subjects with positive results in the follow-up test presented a more advanced bone age and more accelerated linear growth, when compared with subjects with negative results in the follow-up test. Conclusions: According to the statistical analysis, advanced bone age is the most effective predictor of the result of luteinizing hormone-releasing hormone stimulation test.

  6. Central precocious puberty following the diagnosis and treatment of paediatric cancer and central nervous system tumours: presentation and long-term outcomes.

    Science.gov (United States)

    Chemaitilly, Wassim; Merchant, Thomas E; Li, Zhenghong; Barnes, Nicole; Armstrong, Gregory T; Ness, Kirsten K; Pui, Ching-Hon; Kun, Larry E; Robison, Leslie L; Hudson, Melissa M; Sklar, Charles A; Gajjar, Amar

    2016-03-01

    To estimate the prevalence of central precocious puberty (CPP) after treatment for tumours and malignancies involving the central nervous system (CNS) and examine repercussions on growth and pubertal outcomes. Retrospective study of patients with tumours near and/or exposed to radiotherapy to the hypothalamus/pituitary axis (HPA). Patients with CPP were evaluated at puberty onset, completion of GnRH agonist treatment (GnRHa) and last follow-up. Multivariable analysis was used to test associations between tumour location, sex, age at CPP, GnRHa duration and a diagnosis of CPP with final height <-2SD score (SDS), gonadotropin deficiency (LH/FSHD) and obesity, respectively. Eighty patients (47 females) had CPP and were followed for 11·4 ± 5·0 years (mean ± SD). The prevalence of CPP was 15·2% overall, 29·2% following HPA tumours and 6·6% after radiotherapy for non-HPA tumours. Height <-2SDS was more common at the last follow-up than at the puberty onset (21·4% vs 2·4%, P = 0·005). Obesity was more prevalent at the last follow-up than at the completion of GnRHa or the puberty onset (37·7%, 22·6% and 20·8%, respectively, P = 0·03). Longer duration of GnRHa was associated with increased odds of final height <-2SDS (OR = 2·1, 95% CI 1·0-4·3) and longer follow-up with obesity (OR = 1·3, 95% CI 1·1-1·6). LH/FSHD was diagnosed in 32·6%. There was no independent association between CPP and final height <-2SDS, and LH/FSHD and obesity in the subset of patients with HPA low-grade gliomas. Patients with organic CPP experience an incomplete recovery of growth and a high prevalence of LH/FSHD and obesity. Early diagnosis and treatment of CPP may limit further deterioration of final height prospects. © 2015 John Wiley & Sons Ltd.

  7. LIN28B polymorphisms are associated with central precocious puberty and early puberty in girls

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    Sung Won Park

    2012-10-01

    Full Text Available &lt;B&gt;Purpose:&lt;/B&gt; Single-nucleotide polymorphism (SNP markers within &lt;i&gt;LIN28B&lt;/i&gt; have been reported to be related to the timing of pubertal growth. However, no study has investigated the frequency of genetic markers in girls with precocious puberty (PP or early puberty (EP. This study aimed to determine the frequency of putative genetic markers in girls with PP or EP. &lt;B&gt;Methods:&lt;/B&gt; Genomic DNAs were obtained from 77 and 109 girls that fulfilled the criteria for PP and EP, respectively. The controls in this study were 144 healthy volunteers between 20 and 30 years of age. The haplotypes were reconstructed using 11 SNPs of &lt;i&gt;LIN28B&lt;/i&gt;, and haplotype association analysis was performed. The haplotype frequencies were compared. Differences in the clinical and laboratory parameters were analyzed according to the haplotype dosage. &lt;B&gt;Results:&lt;/B&gt; Eleven SNPs in &lt;i&gt;LIN28B&lt;/i&gt; were all located in a block that was in linkage disequilibrium. The haplotype could be reconstructed using 2 representative SNPs, rs4946651 and rs369065. The AC haplotype was less frequently observed in the PP group than in the controls (0.069 vs. 0.144, &lt;I&gt;P&lt;/I&gt;=0.010. The trend that girls with non-AC haplotypes tended to have earlier puberty onset (&lt;I&gt;P&lt;/I&gt;=0.037 was illustrated even in the EP+PP patient group by Kaplan-Meier analysis. &lt;B&gt;Conclusion:&lt;/B&gt; The results of the present study showed that non-AC haplotypes of &lt;i&gt;LIN28B&lt;/i&gt;had a significant association with PP in girls.

  8. Granulosa cell tumor in a six-year-old girl presented as precocious puberty

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    Mahin Hashemipour

    2010-01-01

    Microscopic features of the resected mass were characteristic of juvenile GCT. Although in most of girls with precocious puberty, the etiology is idiopathic, important causes, such as ovarian tumors must be considered.

  9. Characterization of patients diagnosed with central precocious puberty starting treatment with leuprolide acetate, at the Hospital Nacional de Ninos in the period January 2004 to December 2009

    International Nuclear Information System (INIS)

    Viquez Viquez, Natalia

    2013-01-01

    Clinical characteristics and laboratory and cabinet findings (hormone levels, bone age, pelvic ultrasound) were determined in a sample of 39 patients diagnosed with central precocious puberty (CPP) who started treatment with leuprolide acetate (LPA). The cross-sectional observational study was developed at the Hospital Nacional de Ninos 'Dr. Carlos Saenz Herrera' during the period 2004 and 2009. The chronological age of patients with CPP was specified at the time of diagnosis and to start treatment with LPA. Epidemiological characteristics (sex, origin) were described in patients with CPP. Bone age with respect to chronological age was identified in patients with CPP. Sexual maturity of patients with CPP was established by the Tanner scale. The hormone levels of estrogen, testosterone, luteinizing hormone and follicle stimulating hormone were specified in patients with CPP. The etiology was determined in patients with CPP treated with LPA. The adverse effects of treatment with LPA were described. Anthropometric measurements were detailed. The heredo-familial antecedents of precocious puberty were established in patients with diagnosis of CPP. The size of the pelvic organs was evaluated by pelvic ultrasound [es

  10. Factors that predict a positive response on gonadotropin-releasing hormone stimulation test for diagnosing central precocious puberty in girls

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    Junghwan Suh

    2013-12-01

    Full Text Available PurposeThe rapid increase in the incidence of precocious puberty in Korea has clinical and social significance. Gonadotropin-releasing hormone (GnRH stimulation test is required to diagnose central precocious puberty (CPP, however this test is expensive and time-consuming. This study aimed to identify factors that can predict a positive response to the GnRH stimulation test.MethodsClinical and laboratory parameters, including basal serum luteinizing hormone (LH, follicle-stimulating hormone (FSH, and estradiol (E2, were measured in 540 girls with clinical signs of CPP.ResultsTwo hundred twenty-nine of 540 girls with suspected CPP had a peak serum LH level higher than 5 IU/L (the CPP group. The CPP group had advanced bone age (P<0.001, accelerated yearly growth rate (P<0.001, increased basal levels of LH (P=0.02, FSH (P<0.001, E2 (P=0.001, and insulin-like growth factor-I levels (P<0.001 compared to the non-CPP group. In contrast, body weight (P<0.001 and body mass index (P<0.001 were lower in the CPP group. Although basal LH was significantly elevated in the CPP group compared to the non-CPP group, there was considerable overlap between the 2 groups. Cutoff values of basal LH (0.22 IU/L detected CPP with 87.8% sensitivity and 20.9% specificity.ConclusionNo single parameter can predict a positive response on the GnRH stimulation test with both high sensitivity and specificity. Therefore, multiple factors should be considered in evaluation of sexual precocity when deciding the timing of the GnRH stimulation test.

  11. Pathological and incidental findings on brain MRI in a single-center study of 229 consecutive girls with early or precocious puberty

    DEFF Research Database (Denmark)

    Mogensen, Signe Sloth; Aksglaede, Lise; Mouritsen, Annette

    2012-01-01

    Central precocious puberty may result from organic brain lesions, but is most frequently of idiopathic origin. Clinical or biochemical factors which could predict a pathological brain MRI in girls with CPP have been searched for. With the recent decline in age at pubertal onset among US and Europ...

  12. Prostate specific antigen in boys with precocious puberty before and during gonadal suppression by GnRH agonist treatment

    DEFF Research Database (Denmark)

    Juul, A; Müller, J; Skakkebaek, N E

    1997-01-01

    antigen (PSA) is a marker of the androgen-dependent prostatic epithelial cell activity and it is used in the diagnosis and surveillance of adult patients with prostatic cancer. We have measured PSA concentrations in serum from boys with precocious puberty before and during gonadal suppression with Gn......RH agonists to evaluate the effect of normal and precocious puberty on PSA levels and to study the correlation between testosterone and PSA in boys....

  13. Precocious puberty and large multicystic ovaries in young girls with primary hypothyroidism.

    Science.gov (United States)

    Sanjeevaiah, Aravind Raj; Sanjay, Subbarayappa; Deepak, Tejesweni; Sharada, Ardanareshwaran; Srikanta, Sri S

    2007-10-01

    To describe 2 cases of primary hypothyroidism, precocious puberty, large multicystic ovaries, possible diagnostic dilemma, unilateral oophorectomies, and subsequent response to levothyroxine replacement therapy. We present the clinical, biochemical, radiologic, and histopathologic findings in 2 patients with rare cases of Van Wyk-Grumbach syndrome and megaovaries, who underwent unilateral oophorectomy. Two patients, an 8-year-old girl and a 3-year-old girl (cases 1 and 2, respectively), were referred to our center. Both patients presented with precocious puberty and vaginal bleeding and had undergone unilateral oophorectomy before referral. In the first patient (case 1), the surgical intervention was a consequence of torsion of the left megaovary, necessitating emergency oophorectomy. Oophorectomy in the second patient (case 2) was a result of initial diagnostic confusion, inasmuch as a sexcord stromal tumor was suspected. A detailed history, physical examination, and laboratory results pointed toward primary hypothyroidism due to Hashimoto's thyroiditis and thyroid dysgenesis, respectively. Serial ultrasound studies of the abdomen and pelvis revealed large multicystic ovaries, with progressive enlargement (including regrowth from an apparent ovarian "postsurgical remnant"). Both patients responded dramatically after initiation of levothyroxine replacement therapy, with no further vaginal bleeding and reversal of megaovary to normal size (in case 1). In a highly selected minority of children with untreated primary hypothyroidism, there is development of precocious puberty and progressively enlarging multicystic ovaries. The precise endocrine, neuroanatomic, and neurophysiologic bases for this phenomenon are unclear. Nevertheless, the entire clinicopathologic picture, including giant ovaries, dramatically reverts to normal status with the restoration of a euthyroid state by means of simple levothyroxine replacement therapy.

  14. In silico analysis of a novel MKRN3 missense mutation in familial central precocious puberty.

    Science.gov (United States)

    Neocleous, Vassos; Shammas, Christos; Phelan, Marie M; Nicolaou, Stella; Phylactou, Leonidas A; Skordis, Nicos

    2016-01-01

    The onset of puberty is influenced by the interplay of stimulating and restraining factors, many of which have a genetic origin. Premature activation of the GnRH secretion in central precocious puberty (CPP) may arise either from gain-of-function mutations of the KISS1 and KISS1R genes or from loss-of-function manner mutations of the MKRN3 gene leading to MKRN3 deficiency. To explore the genetic causes responsible for CPP and the potential role of the RING finger protein 3 (MKRN3) gene. We investigated potential sequence variations in the intronless MKRN3 gene by Sanger sequencing of the entire 507 amino acid coding region of exon 1 in a family with two affected girls presented with CPP at the age of 6 and 5·7 years, respectively. A novel heterozygous g.Gly312Asp missense mutation in the MKRN3 gene was identified in these siblings. The imprinted MKRN3 missense mutation was also identified as expected in the unaffected father and followed as expected an imprinted mode of inheritance. In silico analysis of the altered missense variant using the computational algorithms Polyphen2, SIFT and Mutation Taster predicted a damage and pathogenic alteration causing CPP. The pathogenicity of the alteration at the protein level via an in silico structural model is also explored. A novel mutation in the MKRN3 gene in two sisters with CPP was identified, supporting the fundamental role of this gene in the suppression of the hypothalamic GnRH neurons. © 2015 John Wiley & Sons Ltd.

  15. Genetics Home Reference: central precocious puberty

    Science.gov (United States)

    ... odor. Girls also develop breasts and begin their menstrual periods. Boys have growth of the penis and ... puberty earlier than normal. For most genes, both copies of the gene (one copy inherited from each ...

  16. [Evolutionary perspective in precocious puberty].

    Science.gov (United States)

    Hochberg, Ze'ev

    2014-10-01

    Pubertal development is subject to substantial heritability, but much variation remains to be explained, including fast changes over the last 150 years, that cannot be explained by changes of gene frequency in the population. This article discusses the influence of environmental factors to adjust maturational tempo in the service of fitness goals. Utilizing evolutionary development thinking (evo-devo), the author examines adolescence as an evolutionary life-history stage in its developmental context. The transition from the preceding stage of juvenility entails adaptive plasticity in response to energy resources, social needs of adolescence and maturation toward youth and adulthood. Using Belsky's evolutionary theory of socialization, I show that familial psychosocial environment during the infancy-childhood and childhood-juvenility transitions foster a fast life-history and reproductive strategy rather than early maturation being just a risk factor for aggression and delinquency. The implications of the evo-devo framework for theory building, illuminates new directions in the understanding of precocious puberty other than a diagnosis of a disease.

  17. Four generations in a family with neurofibromatosis 1: precocious puberty and optic nerve tumor (OPT).

    Science.gov (United States)

    Gucev, Z; Krstevska-Konstantinova, M; Tasic, V; Jancevska, A; Kirovski, I; Pop-Jordanova, N

    2010-01-01

    Neurofibromatosis type 1 (NF1) is an autosomal dominant disorder with varied clinical manifestations. The proband is a 6-year-old boy with signs of precocious puberty. His penis was 10 cm, testicles 8 ml, pubic hair P2-3, and the genital skin was hyperpigmented. Multiple cafe au lait spots well above 5 mm were noticeable on his skin, as well as hard subcutaneous nodules, mostly on his trunk. His intelligence and hearing are normal. He has no history of seizures. Laboratory analysis showed: LH LH 1.4 mIU/ml, FSH 6.2 mIU/ml, testosterone 183 ng/ml. Bone age was 9 years. LHRH stimulation was characteristic of true precocious puberty (LH 9.8 mIU/ml and FSH 8.9 mIU/ml after 30 minutes). The MRI of the brain showed a tumor of the suprasellar region with compression of the pituitary stalk. At present the boy is 6 years old and has been treated with triptoreline acetate for 3 months. The volume of the testicles has decreased to 7 ml and a slight loss of pubic hair was noted. In addition, his mother and his grandfather exhibited dermal masses, and focal cutaneous and subcutaneous growths. The great-grand father had had the same cutaneous changes and died at the age of 75 from unrelated causes. It has already been well documented that NF is associated with an increased risk of malignancy and precocious puberty. Hence, we emphasize the need for a close and regular clinical follow-up of the OPT, puberty and patterns of growth.

  18. Sex hormone binding globulin, free estradiol index, and lipid profiles in girls with precocious puberty

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    Hyun-Wook Chae

    2013-06-01

    Full Text Available PurposeSex hormone-binding globulin (SHBG modulates the availability of biologically active free sex hormones. The regulatory role of SHBG might be important in the relationship between hormone levels and the modification of lipid profiles in girls with precocious puberty. However, few studies have evaluated the relationship of SHBG, free estradiol index (FEI, and lipid levels in these girls.MethodsOne hundred and nine girls less than 8 years of age with pubertal development were enrolled. FEI was calculated with SHBG and estradiol (E2. We analyzed SHBG between peak luteinizing hormone (LH≥5 (IU/L (group 1 and LH<5 (IU/L (group 2 through a gonadotropin releasing hormone stimulation test.ResultsBody mass index (BMI standard deviation score (SDS was higher in group 2 than in group 1 (P=0.004. Serum SHBG levels did not differ and FEI was not higher in group 1 (P=0.122. Serum cholesterol, HDL, and LDL did not differ; however, triglyceride levels were higher in group 2 (P=0.023. SHBG was negatively correlated with bone age advancement, BMI, BMI SDS, and FEI, and was positively correlated with HDL. However, SHBG was not correlated with E2 or peak LH.ConclusionSerum SHBG itself might not be associated with precocious puberty in girls, but it might be related to BMI and lipid profiles. Further studies are needed to reveal the relationship between sex hormone and obesity in girls with precocious puberty.

  19. Boys with precocious or early puberty: incidence of pathological brain magnetic resonance imaging findings and factors related to newly developed brain lesions

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    Keun Hee Choi

    2013-12-01

    Full Text Available PurposeBrain magnetic resonance imaging (MRI findings and factors predictive of pathological brain lesions in boys with precocious puberty (PP or early puberty (EP were investigated.MethodsSixty-one boys with PP or EP who had brain MRI performed were included. PP was classified into the central or peripheral type. Brain MRI findings were categorized into group I (pathological brain lesion known to cause puberty; newly diagnosed [group Ia] or previously diagnosed [group Ib]; group II (brain lesion possibly related to puberty; and group III (incidental or normal findings. Medical history, height, weight, hormone test results, and bone age were reviewed.ResultsBrain lesions in groups I and II were detected in 17 of 23 boys (74% with central PP, 9 of 30 boys (30% with EP, and 7 of 8 boys (88% with peripheral PP. All brain lesions in boys with peripheral PP were germ cell tumors (GCT, and 3 lesions developed later during follow-up. Group I showed earlier pubertal onset (P<0.01 and greater bone age advancement (P<0.05 than group III. Group III had lower birth weight and fewer neurological symptoms than "Ia and II" (all P<0.05.ConclusionEarlier onset of puberty, greater bone age advancement, and/or neurological symptoms suggested a greater chance of pathological brain lesions in boys with central PP or EP. All boys with peripheral PP, even those with normal initial MRI findings, should be evaluated for the emergence of GCT during follow-up.

  20. A boy with Prader-Willi syndrome: unmasking precocious puberty during growth hormone replacement therapy.

    Science.gov (United States)

    Ludwig, Natasha G; Radaeli, Rafael F; Silva, Mariana M X; Romero, Camila M; Carrilho, Alexandre J F; Bessa, Danielle; Macedo, Delanie B; Oliveira, Maria L; Latronico, Ana Claudia; Mazzuco, Tânia L

    2016-01-01

    Prader-Willi syndrome (PWS) is a genetic disorder frequently characterized by obesity, growth hormone deficiency, genital abnormalities, and hypogonadotropic hypogonadism. Incomplete or delayed pubertal development as well as premature adrenarche are usually found in PWS, whereas central precocious puberty (CPP) is very rare. This study aimed to report the clinical and biochemical follow-up of a PWS boy with CPP and to discuss the management of pubertal growth. By the age of 6, he had obesity, short stature, and many clinical criteria of PWS diagnosis, which was confirmed by DNA methylation test. Therapy with recombinant human growth hormone (rhGH) replacement (0.15 IU/kg/day) was started. Later, he presented psychomotor agitation, aggressive behavior, and increased testicular volume. Laboratory analyses were consistent with the diagnosis of CPP (gonadorelin-stimulated LH peak 15.8 IU/L, testosterone 54.7 ng/dL). The patient was then treated with gonadotropin-releasing hormone analog (GnRHa). Hypothalamic dysfunctions have been implicated in hormonal disturbances related to pubertal development, but no morphologic abnormalities were detected in the present case. Additional methylation analysis (MS-MLPA) of the chromosome 15q11 locus confirmed PWS diagnosis. We presented the fifth case of CPP in a genetically-confirmed PWS male. Combined therapy with GnRHa and rhGH may be beneficial in this rare condition of precocious pubertal development in PWS.

  1. Cognitive, emotional and psychosocial functioning of girls treated with pharmacological puberty blockage for idiopathic central precocious puberty

    Directory of Open Access Journals (Sweden)

    Slawomir Wojniusz

    2016-07-01

    Full Text Available Central precocious puberty (CPP develops due to premature activation of the hypothalamic-pituitary-gonadal (HPG axis, resulting in early pubertal changes and rapid bone maturation. CPP is associated with lower adult height and increased risk for development of psychological problems. Standard treatment of CPP is based on postponement of pubertal development by blockade of the HPG axis with gonadotropin releasing hormone analogs (GnRHa leading to abolition of gonadal sex hormones synthesis. Whereas the hormonal and auxological effects of GnRHa are well researched, there is a lack of knowledge whether GnRHa treatment influences psychological functioning of treated children, despite the fact that prevention of psychological problems is used as one of the main reasons for treatment initiation. In the present study we seek to address this issue by exploring differences in cognitive function, behavior, emotional reactivity, and psychosocial problems between GnRHa treated CPP girls and age-matched controls.Fifteen girls with idiopathic CPP; median age 10.4 years, treated with slow-release GnRHa (triptorelin acetate – Decapeptyl SR ® 11.25 and 15 age-matched controls, were assessed with a comprehensive test battery consisting of paper and pencil tests, computerized tasks, behavioral paradigms, heart rate variability, and questionnaires filled in by the children’s parents. Both groups showed very similar scores with regard to cognitive performance, behavioral and psychosocial problems. Compared to controls, treated girls displayed significantly higher emotional reactivity (p = 0.016; Cohen’s d = 1.04 on one of the two emotional reactivity task conditions. Unexpectedly, the CPP group showed significantly lower resting heart rates than the controls (p = 0.004; Cohen’s d = 1.03; lower heart rate was associated with longer treatment duration (r = - 0.582, p = 0.037. The results suggest that GnRHa treated CPP girls do not differ in their cognitive or

  2. Prostate specific antigen in boys with precocious puberty before and during gonadal suppression by GnRH agonist treatment

    DEFF Research Database (Denmark)

    Juul, A; Müller, J; Skakkebaek, N E

    1997-01-01

    antigen (PSA) is a marker of the androgen-dependent prostatic epithelial cell activity and it is used in the diagnosis and surveillance of adult patients with prostatic cancer. We have measured PSA concentrations in serum from boys with precocious puberty before and during gonadal suppression with Gn......In healthy boys, the pituitary-gonadal axis exhibits diurnal variation in early puberty. Serum testosterone levels are higher during the night and low or immeasurable during the day. These fluctuating levels of circulating androgens in early pubertal boys are difficult to monitor. Prostate specific...

  3. Leptin and adiponectin levels in girls with central precocious puberty before and during GnRH agonist treatment

    Directory of Open Access Journals (Sweden)

    Jae Won Yoo

    2016-12-01

    Full Text Available PurposeThe effects of gonadotropin-releasing hormone agonist (GnRHa treatment on the energy metabolism in girls with central precocious puberty (CPP are controversial. We focused the changes and related factors of serum levels of leptin and adiponectin in girls with CPP before and during GnRHa treatment.MethodsThirty girls with idiopathic CPP were enrolled in the study. Their auxological data and fasting blood were collected at the baseline and after six months of GnRHa treatment.ResultsAfter treatment, height (P<0.001, weight (P<0.001, and serum leptin levels (P=0.033 were significantly increased, whereas body mass index (BMI, homeostasis model of assessment-insulin resistance, serum adiponectin levels, and adiponectin/leptin ratio exhibited no significant changes. A Pearson correlation analysis showed that height, weight, BMI, and their standard deviation scores (SDSs, but not basal LH, FSH, and estradiol, were significantly correlated with serum leptin levels before and after GnRHa treatment. After a multiple linear regression analysis, only BMI was associated with serum leptin levels. Moreover, leptin SDSs adjusted for BMI were not significantly different before and after GnRHa. The Δ leptin levels (r2=0.207, P=0.012, but not with Δ leptin SDS (r2=0.019, P=0.556, during GnRHa treatment were positively correlated with Δ BMI.ConclusionThese results suggest that GnRHa treatment in girls with CPP does not affect serum levels of leptin and adiponectin and insulin resistance. Serum leptin levels were depend on the changes in BMI during GnRHa treatment.

  4. Adrenocorticotropin-dependent precocious puberty of testicular origin in a boy with X-linked adrenal hypoplasia congenita due to a novel mutation in the DAX1 gene.

    Science.gov (United States)

    Domenice, S; Latronico, A C; Brito, V N; Arnhold, I J; Kok, F; Mendonca, B B

    2001-09-01

    Primary adrenal insufficiency is a rare condition in pediatric age, and its association with precocious sexual development is very uncommon. We report a 2-yr-old Brazilian boy with DAX1 gene mutation whose first clinical manifestation was isosexual gonadotropin-independent precocious puberty. He presented with pubic hair, enlarged penis and testes, and advanced bone age. T levels were elevated, whereas basal and GnRH-stimulated LH levels were compatible with a prepubertal pattern. Chronic GnRH agonist therapy did not reduce T levels, supporting the diagnosis of gonadotropin-independent precocious puberty. Testotoxicosis was ruled out after normal sequencing of exon 11 of the LH receptor gene. At age 3 yr he developed clinical and hormonal features of severe primary adrenal insufficiency. The entire coding region of the DAX1 gene was analyzed through direct sequencing. A nucleotide G insertion between nucleotides 430 and 431 in exon 1, resulting in a novel frameshift mutation and a premature stop codon at position 71 of DAX-1, was identified. Surprisingly, steroid replacement therapy induced a clear decrease in testicular size and T levels to the prepubertal range. These findings suggest that chronic excessive ACTH levels resulting from adrenal insufficiency may stimulate Leydig cells and lead to gonadotropin-independent precocious puberty in some boys with DAX1 gene mutations.

  5. Circulating MKRN3 levels decline prior to pubertal onset and through puberty

    DEFF Research Database (Denmark)

    Hagen, Casper P; Sørensen, Kaspar; Mieritz, Mikkel G

    2015-01-01

    CONTEXT: Puberty is initiated by a complex interaction of suppressing and stimulating factors. Genetic studies of familial central precocious puberty have suggested makorin ring finger protein 3 (MKRN3) as a major inhibitor of GnRH secretion during childhood. Furthermore, genetic variation near...... of hypothalamic GnRH secretion during childhood. Undetectable or low MKRN3 levels were observed in a subgroup of patients with early onset of puberty....

  6. Significance of determination of female sex hormones (E2, LH, FSH), insulin-like growth factor I (IGF-I) and leptin in girls with precocious puberty

    International Nuclear Information System (INIS)

    Huang Jianrong

    2004-01-01

    Objective: To investigate the diagnostic value of determination of serum levels of estradiol (E 2 ), luteinizing hormone (LH) and follicle stimulating hormone (FSH), insulin-like growth factor (IGF-I) and leptin in girls with idiopathic central precocious puberty (ICPP). Methods: Serum E 2 , LH, FSH, IGF-I (with chemiluminescence immunoassay) and leptin (with RIA) levels were determined in 35 girls with early development of breast as the sign of precocious puberty, of which, 15 was considered to be of the ICPP group and 20 of simple premature thelarche group (SPT). Criteria of diagnosis for ICPP were: peak LH value>12IU/L and LH/FSH>1 after GnRH stimulating test. Results: Serum E 2 , LH, FSH, IGF-I leptin levels in girls with ICPP were significantly higher than those in the girls with SPT (P 0.2 as the cut-off value for diagnosis of ICPP there would still be a positive rate of 86.6% suggesting that the diagnostic criteria might be set lower. Serum IGF-I levels were positively correlated to those of E 2 (r=0.47, P 2 and IGF-I. Conclusion: Determinations of serum E 2 , LH, FHS, IGF-I and leptin levels were helpful for the early diagnosis of ICPP. (author)

  7. What Are Common Treatments for Problems of Puberty?

    Science.gov (United States)

    ... Print What are common treatments for problems of puberty? Precocious Puberty There are a number of reasons to treat ... hormone (LH) and follicle-stimulating hormone (FSH). Delayed Puberty With delayed puberty or hypogonadism, treatment varies with ...

  8. Change in body mass index and insulin resistance after 1-year treatment with gonadotropin-releasing hormone agonists in girls with central precocious puberty.

    Science.gov (United States)

    Park, Jina; Kim, Jae Hyun

    2017-03-01

    Gonadotropin-releasing hormone agonist (GnRHa) is used as a therapeutic agent for central precocious puberty (CPP); however, increased obesity may subsequently occur. This study compared body mass index (BMI) and insulin resistance during the first year of GnRHa treatment for CPP. Patient group included 83 girls (aged 7.0-8.9 years) with developed breasts and a peak luteinizing hormone level of ≥5 IU/L after GnRH stimulation. Control group included 48 prepubertal girls. BMI and insulin resistance-related indices (homeostasis model assessment of insulin resistance [HOMA-IR] and quantitative insulin sensitivity check index [QUICKI]) were used to compare the groups before treatment, and among the patient group before and after GnRHa treatment. No statistical difference in BMI z -score was detected between the 2 groups before treatment. Fasting insulin and HOMA-IR were increased in the patient group; fasting glucose-to-insulin ratio and QUICKI were increased in the control group (all P resistance compared to the control group. During GnRHa treatment, normal-weight individuals showed increased BMI z -scores without increased insulin resistance; the overweight group demonstrated increased insulin resistance without significantly altered BMI z -scores. Long-term follow-up of BMI and insulin resistance changes in patients with CPP is required.

  9. Adult height in girls with central precocious puberty treated with gonadotropin-releasing hormone agonist with or without growth hormone

    Directory of Open Access Journals (Sweden)

    Mo Kyung Jung

    2014-12-01

    Full Text Available PurposeThere is controversy surrounding the growth outcomes of treatment with gonadotropin-releasing hormone agonist (GnRHa in central precocious puberty (CPP. We analyzed height preservation after treatment with GnRHa with and without growth hormone (GH in girls with CPP.MethodsWe reviewed the medical records of 82 girls with idiopathic CPP who had been treated with GnRHa at Severance Children's Hospital from 2004 to 2014. We assessed the changes in height standard deviation score (SDS for bone age (BA, and compared adult height (AH with midparental height (MPH and predicted adult height (PAH during treatment in groups received GnRHa alone (n=59 or GnRHa plus GH (n=23.ResultsIn the GnRHa alone group, the height SDS for BA was increased during treatment. AH (160.4±4.23 cm was significantly higher than the initial PAH (156.6±3.96 cm (P<0.001, and it was similar to the MPH (159.9±3.52 cm. In the GnRHa plus GH group, the height SDS for BA was also increased during treatment. AH (159.3±5.33 cm was also higher than the initial PAH (154.6±2.55 cm (P<0.001, which was similar to the MPH (158.1±3.31 cm. Height gain was slightly higher than that in the GnRHa alone group, however it statistically showed no significant correlation with GH treatment.ConclusionIn CPP girls treated with GnRHa, the height SDS for BA was increased, and the AH was higher than the initial PAH. Combined GH treatment showed a limited increase in height gain.

  10. Circulating MKRN3 Levels Decline During Puberty in Healthy Boys

    DEFF Research Database (Denmark)

    Busch, Alexander S.; Hagen, Casper P; Almstrup, Kristian

    2016-01-01

    CONTEXT: Initiation and progression of puberty requires concerted action of hypothalamic activating and inhibiting factors. Recently, cases of familial central precocious puberty have been linked to loss-of-function mutations of makorin RING-finger protein 3 (MKRN3) indicating a pivotal inhibitory.......8-11.8) years at baseline followed for 6.0 (0.5-7.6) years (2006-2014) with blood sampling every 6 months. INTERVENTION: None. MAIN OUTCOME MEASURES: Serum levels of MKRN3: 623 samples, median (range) 12 (2-14) per boy. RESULTS: MKRN3 levels declined before onset of puberty; the geometric mean (95% confidence...... interval) 5 years before onset of puberty vs last visit before onset of puberty was 216 (169-272) pg/mL vs 128 (118-139) pg/mL (P puberty progressed. MKRN3 levels were not associated with age at onset of puberty. CONCLUSION: Declining MKRN3...

  11. [Primary glucocorticoid resistance syndrome presenting as pseudo-precocious puberty and galactorrhea].

    Science.gov (United States)

    Xiang, Shu-lin; He, Li-ping; Ran, Xing-wu; Tian, Hao-ming; Li, Xiu-jun; Liang, Jin-zhong

    2008-09-01

    Primary glucocorticoid resistance syndrome (PGRS) is a rare condition characterized by hypercortisolism without Cushing's syndrome. This report describes a 7-year-old boy of PGRS with pseudo-precocious puberty and galactorrhea as the main manifestation. His height was 135 cm and body weight was 31 kg. Pigmentation could be seen in the skin, mammary areola and penis. He had hirsutism, low hair line, coarse voice, Tanner stage 3 pubic hair, penis in adult form, accelerated linear growth, and advanced bone age (13 yr.), but normal (for age) testes. Furthermore, he had mammoplasia and galactorrhea. There were no features of glucocorticoid (GC) excess. Hepatic function was impaired (ALT 1426 IU/L, AST 611 IU/L) with no definite causes. Serum cortisol concentration was 1294 nmol/L, 777 nmol/L, 199.3 nmol/L at 8:00, 16:00 and 24:00 respectively. Plasma adrenocorticotropic hormone (ACTH) was normal or a little higher (43.9-80 ng/L). Urinary-free cortisol (UFC) was normal (55.5-62.4 microg/24 h). Serum estradiol (E2), progesterone (P), testosterone (T), luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were normal. Serum dehydroepiandrosterone sulfate (DHEAS, 60 microg/dL) and serum prolactin (PRL, 58.7-183.9 ng/mL) level were high, urinary dehydroepiandrosterone (DHEA) level was also elevated (0.96-3.2 mg/mL). Gonadotrophin hormone-releasing hormone (GnRH) stimulation test was negative. Serum cortisol responded normally to insulin-induced hypoglycemia. However, serum cortisol and plasma ACTH concentration was suppressed to more than 50% by 0.5 mg dexamethasone (DEX). The diagnosis of PGRS was made. TREATMENT AND FOLLOW-UP: The patient received a treatment of 0.75-1.0 mg/d DEX. Because of galactorrhea, bromocriptine was given by 1.25-3.75 mg/d. After 24 months follow-up, the pigmentation was relieved and galactorrhea disappeared. No advanced development of the external genitalia and breast was found. The acceleration of the bone age was also slowed down. But

  12. DEHP exposure in utero disturbs sex determination and is potentially linked with precocious puberty in female mice

    International Nuclear Information System (INIS)

    Wang, Yongan; Yang, Qing; Liu, Wei; Yu, Mingxi; Zhang, Zhou; Cui, Xiaoyu

    2016-01-01

    Human's ubiquitous exposure to di (2-ethylhexyl) phthalate (DEHP) is thought to be associated with female reproductive toxicity. Previous studies found that DEHP inhibited follicle growth and decreased estradiol levels in adult female mice. However, limited information is available on the link between in utero DEHP exposure and ovarian development in female mouse offspring. The present study evaluates the disturbances in regulatory genes involved in female sex determination and the ovarian outcomes in fetal and postnatal female mice treated with in utero DEHP exposure. Pregnant mice were exposed to DEHP by gavage, with the dosage regime beginning at human relevant exposure levels. After in utero DEHP exposure, increased follicular atresia was observed in the female pups at postnatal days (PND) 21. Foxl2 expression was significantly upregulated, and Fst was significantly downregulated by DEHP above 2 mg/kg/d at PND 1 and 21. This suggests that lesion of granulosa cell differentiation and disturbance of follicle development in postnatal female mice. The expression of Cyp11a1 and Star were significantly downregulated by in utero DEHP exposure, indicating effects on estradiol biosynthesis. The female sex determination pathway was disturbed in fetus by DEHP at 2 mg/kg/d and above during the critical time window of sex determination causing significant upregulation of Foxl2, Wnt4, β-catenin and Fst. Furthermore, the increased expression of Wnt4 was supported by whole-mount in situ hybridization (WISH). These results suggest a possible association between in utero DEHP exposure and precocious puberty in the postnatal life of mice offspring, where disturbance of the sex determination regulating pathway acted as an important mechanism. - Highlights: • Maternal exposure to di (2-ethylhexyl) phthalate disturbs fetus sex determination. • DEHP upregulated Foxl2 expression potentially disturbs postnatal granulosa cell differentiation. • DEHP accelerated medulla

  13. DEHP exposure in utero disturbs sex determination and is potentially linked with precocious puberty in female mice

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Yongan [Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024 (China); Yang, Qing [School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning 116024 (China); Liu, Wei, E-mail: liu_wei@dlut.edu.cn [Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024 (China); Yu, Mingxi; Zhang, Zhou; Cui, Xiaoyu [Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024 (China)

    2016-09-15

    Human's ubiquitous exposure to di (2-ethylhexyl) phthalate (DEHP) is thought to be associated with female reproductive toxicity. Previous studies found that DEHP inhibited follicle growth and decreased estradiol levels in adult female mice. However, limited information is available on the link between in utero DEHP exposure and ovarian development in female mouse offspring. The present study evaluates the disturbances in regulatory genes involved in female sex determination and the ovarian outcomes in fetal and postnatal female mice treated with in utero DEHP exposure. Pregnant mice were exposed to DEHP by gavage, with the dosage regime beginning at human relevant exposure levels. After in utero DEHP exposure, increased follicular atresia was observed in the female pups at postnatal days (PND) 21. Foxl2 expression was significantly upregulated, and Fst was significantly downregulated by DEHP above 2 mg/kg/d at PND 1 and 21. This suggests that lesion of granulosa cell differentiation and disturbance of follicle development in postnatal female mice. The expression of Cyp11a1 and Star were significantly downregulated by in utero DEHP exposure, indicating effects on estradiol biosynthesis. The female sex determination pathway was disturbed in fetus by DEHP at 2 mg/kg/d and above during the critical time window of sex determination causing significant upregulation of Foxl2, Wnt4, β-catenin and Fst. Furthermore, the increased expression of Wnt4 was supported by whole-mount in situ hybridization (WISH). These results suggest a possible association between in utero DEHP exposure and precocious puberty in the postnatal life of mice offspring, where disturbance of the sex determination regulating pathway acted as an important mechanism. - Highlights: • Maternal exposure to di (2-ethylhexyl) phthalate disturbs fetus sex determination. • DEHP upregulated Foxl2 expression potentially disturbs postnatal granulosa cell differentiation. • DEHP accelerated medulla

  14. The Effect of Bisphenol A on Puberty: A Critical Review of the Medical Literature.

    Science.gov (United States)

    Leonardi, Alberto; Cofini, Marta; Rigante, Donato; Lucchetti, Laura; Cipolla, Clelia; Penta, Laura; Esposito, Susanna

    2017-09-10

    Many scientific studies have revealed a trend towards an earlier onset of puberty and have disclosed an increasing number of children that display precocious puberty. As an explanation, some authors have considered the global socio-economic improvement across different populations, and other authors have considered the action of endocrine disrupting chemicals (EDCs). Among these, bisphenol A (BPA), an aromatic compound largely used worldwide as a precursor of some plastics and chemical additives, is well known for its molecular oestrogen-like and obesogenic actions. We reviewed the medical literature of the previous 20 years that examined associations between BPA exposure and the age of puberty in humans, considering only those referring to clinical or epidemiological data. Of 19 studies, only 7 showed a correlation between BPA and puberty. In particular, the possible disruptive role of BPA on puberty may be seen in those with central precocious puberty or isolated premature breast development aged 2 months to 4 years old, even if the mechanism is undefined. Some studies also found a close relationship between urinary BPA, body weight, and early puberty, which can be explained by the obesogenic effect of BPA itself. The currently available data do not allow establishment of a clear role for BPA in pubertal development because of the conflicting results among all clinical and epidemiological studies examined. Further research is needed to fully understand the potential role of exposure to EDCs and their adverse endocrine health outcomes.

  15. Nocturnal Urinary Excretion of FSH and LH in Children and Adolescents With Normal and Early Puberty

    DEFF Research Database (Denmark)

    Kolby, Nanna; Busch, Alexander S; Aksglaede, Lise

    2017-01-01

    aimed to evaluate urinary and serum gonadotropin levels according to age, sex, and pubertal stage in healthy children and to assess the clinical use of FMV urinary gonadotropins in children with disordered puberty. Design: Cross-sectional part of the COPENHAGEN Puberty Study and longitudinal study...... of patients. Setting: Population-based and outpatient clinic. Patients or Other Participants: Eight hundred forty-three healthy children from the COPENHAGEN Puberty Study and 25 girls evaluated for central precocious puberty (CPP). Main Outcome Measures: Clinical pubertal staging, including serum and urinary...... gonadotropin levels. Results: Urinary gonadotropins increased with advancing age and pubertal development and were detectable in FMV urine before physical signs of puberty. FMV urinary LH correlated strongly with basal (r = 0.871, P

  16. Circulating MKRN3 Levels Decline During Puberty in Healthy Boys.

    Science.gov (United States)

    Busch, Alexander S; Hagen, Casper P; Almstrup, Kristian; Juul, Anders

    2016-06-01

    Initiation and progression of puberty requires concerted action of hypothalamic activating and inhibiting factors. Recently, cases of familial central precocious puberty have been linked to loss-of-function mutations of makorin RING-finger protein 3 (MKRN3) indicating a pivotal inhibitory role of the protein on GnRH secretion. To investigate peripubertal circulating MKRN3 levels in healthy boys. Population-based longitudinal study in healthy Danish boys. General community. Healthy boys (n = 60) aged (median [range]) 9.3 (5.8-11.8) years at baseline followed for 6.0 (0.5-7.6) years (2006-2014) with blood sampling every 6 months. None. Serum levels of MKRN3: 623 samples, median (range) 12 (2-14) per boy. MKRN3 levels declined before onset of puberty; the geometric mean (95% confidence interval) 5 years before onset of puberty vs last visit before onset of puberty was 216 (169-272) pg/mL vs 128 (118-139) pg/mL (P puberty progressed. MKRN3 levels were not associated with age at onset of puberty. Declining MKRN3 before pubertal onset support MKRN3 as an inhibitor of GnRH secretion during midchildhood.

  17. The significance of measuring serum IGF1, IGFBP3 and OST for the judgement of abnormal skeletal development and therapeutic monitoring in precocious children

    International Nuclear Information System (INIS)

    Ji Zhiying; Zhao Ruifang; Lv Xiaomei; Gu Fanlei; Cai Depei

    2004-01-01

    Objective: To study the value of measuring serum insulin-like growth factor I (IGF 1 ), insulin-like growth factor binding protein III (IGFBP 3 ) and osteocalcin (OST) for evaluating acceleration of skeletal growth and skeletal maturity, and its value for therapeutic monitoring in precocious children. Methods: Serum IGF 1 and IGFBP 3 were measured with immunoradiometric assay, serum OST was measured with radioimmunoassay in 117 girls with idiopathic precocious puberty. The girls were grouped according to age, and various parameters collected from them were compared with normal values of matched girls. Furthermore, the girls were grouped according to Tanner's staging (the extent of precocious puberty), the analysis of correlativity between various parameters to the extent of precocious puberty was performed, and the analysis of correlativity between the level of serum IGF 1 and advancing of bone age was performed. Various parameters were measured once more in 38 of the study girls after six months of the treatment, and the parameters were compared with that before treatment. Results: 1) The levels of serum IGF 1 and OST in the girls with precocious puberty were elevated obviously than that in matched normal girls, but the level of serum IGFBP 3 was reduced obviously than that in matched normal girls. It was demonstrated that typical elevation of serum IGF 1 and OST occurred in normal adolescence appeared ahead of time in the girls with precocious puberty. 2) The extent of precocious puberty correlated closely with the level of serum IGF 1 (r=0.489, P 1 (r=0.411, P 1 was. 3) After the treatment, the concentration of serum IGF 1 reduced from (455.52 ± 119.45) μg/L to (284.55 ± 99.52) μg/L (P 1 and OST reduced obviously. Conclusions: Serum IGF 1 and OST could act as quantitative parameters for evaluating acceleration of skeletal growth and advancing of skeletal maturity in girls with idiopathic true precocious puberty. It could act as a parameter for therapeutic

  18. [Rapidly progressive puberty in a patient with mosaic Turner syndrome: a case report and literature review].

    Science.gov (United States)

    Liang, Y; Wei, H; Yu, X; Huang, W; Luo, X P

    2017-02-02

    Objective: To explore the clinical characteristics of diagnosis and treatment in patients with Turner syndrome and rapidly progressive puberty. Method: A rare case of rapidly progressive puberty in Turner syndrome with a mosaic karyotype of 45, X/46, X, del(X)(p21)(80%/20%)was diagnosed at Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology in January. 2015. Clinical characteristics and the related literature were reviewed. Original papers on precocious puberty or rapidly progressive puberty in Turner syndrome, published until Apr. 2016 were retrieved at PubMed and CNKI databases by the use of the key words "Turner syndrome" , "precocious puberty" and "rapidly progressive puberty" . Result: The patient was born at term with birth weight of 2 450 g and was diagnosed with SGA at 3 years of age for the first evaluating of growth and development. Then recombined human growth hormone (rhGH )was given at 4 years of age due to short stature (heightTurner syndrome is reported. Although short stature and ovarian dysgenesis are common in TS, precocious puberty may occur in TS, which is liable to cause delayed diagnosis and misdiagnosis. Careful examination is recommended for patients with unusual growth pattern, even though girls have normal height in accord with standard growth curve or spontaneous puberty. Evaluation for TS and subsequent investigation should be prompted.

  19. Change in body mass index and insulin resistance after 1-year treatment with gonadotropin-releasing hormone agonists in girls with central precocious puberty

    Directory of Open Access Journals (Sweden)

    Jina Park

    2017-03-01

    Full Text Available PurposeGonadotropin-releasing hormone agonist (GnRHa is used as a therapeutic agent for central precocious puberty (CPP; however, increased obesity may subsequently occur. This study compared body mass index (BMI and insulin resistance during the first year of GnRHa treatment for CPP.MethodsPatient group included 83 girls (aged 7.0–8.9 years with developed breasts and a peak luteinizing hormone level of ≥5 IU/L after GnRH stimulation. Control group included 48 prepubertal girls. BMI and insulin resistance-related indices (homeostasis model assessment of insulin resistance [HOMA-IR] and quantitative insulin sensitivity check index [QUICKI] were used to compare the groups before treatment, and among the patient group before and after GnRHa treatment.ResultsNo statistical difference in BMI z-score was detected between the 2 groups before treatment. Fasting insulin and HOMA-IR were increased in the patient group; fasting glucose-to-insulin ratio and QUICKI were increased in the control group (all P<0.001. In normal-weight subjects in the patient group, BMI z-score was significantly increased during GnRHa treatment (−0.1±0.7 vs. 0.1±0.8, P<0.001, whereas HOMA-IR and QUICKI exhibited no differences. In overweight subjects in the patient group; BMI z-score and HOMA-IR were not significantly different, whereas QUICKI was significantly decreased during GnRHa treatment (0.35±0.03 vs. 0.33±0.02, P=0.044.ConclusionGirls with CPP exhibited increased insulin resistance compared to the control group. During GnRHa treatment, normal-weight individuals showed increased BMI z-scores without increased insulin resistance; the overweight group demonstrated increased insulin resistance without significantly altered BMI z-scores. Long-term follow-up of BMI and insulin resistance changes in patients with CPP is required.

  20. STUDY OF CLINICAL PROFILE OF PATIENTS PRESENTING WITH SEXUAL PRECOCITY TO A TERTIARY CARE HOSPITAL

    Directory of Open Access Journals (Sweden)

    Binoy Kumar Mohanty

    2016-07-01

    Full Text Available BACKGROUND Precocious puberty is a common paediatric endocrine disorder seen in clinical practice. OBJECTIVE To study the various aetiologies and clinical presentations of patients presenting with sexual precocity to a tertiary care hospital. DESIGN Cross sectional study. MATERIAL AND METHODS We collected and analysed the clinical data including hormonal status of 24 consecutive patients who presented to our department from January 2014 to December 2015 for evaluation of sexual precocity. RESULTS Most of the patients presenting to us had evidence of precocious puberty (n=16, followed by premature adrenarche (n=5 and premature thelarche (n=3 respectively. The females outnumbered males in our study (68.75% of total cases. Females presenting with central precocious puberty had no appreciable cause (idiopathic in majority (85.72% of cases. While, males presenting with central precocious puberty had an organic cause (60% in majority of cases. CONCLUSIONS Precocious puberty is more common among females as compared to males. Organic lesion must be ruled out in all patients presenting with central precocious puberty especially in males.

  1. Precocious pseudopuberty due to juvenile granulosa cell tumor

    International Nuclear Information System (INIS)

    Saeed, G.A.; Farooq, N.

    2003-01-01

    A case of precocious puberty occurring in a young girl is presented. Vaginal bleeding and secondary sexual characteristics had occurred at 7 years of age associated with an abdominal mass. These findings were due to a functional juvenile granulosa cell tumor in the right ovary. Right adenectomy was performed. Histopathology was confirmatory. (author)

  2. Evaluation of puberty by verifying spontaneous and stimulated gonadotropin values in girls.

    Science.gov (United States)

    Chin, Vivian L; Cai, Ziyong; Lam, Leslie; Shah, Bina; Zhou, Ping

    2015-03-01

    Changes in pharmacological agents and advancements in laboratory assays have changed the gonadotropin-releasing hormone analog stimulation test. To determine the best predictive model for detecting puberty in girls. Thirty-five girls, aged 2 years 7 months to 9 years 3 months, with central precocious puberty (CPP) (n=20) or premature thelarche/premature adrenarche (n=15). Diagnoses were based on clinical information, baseline hormones, bone age, and pelvic sonogram. Gonadotropins and E2 were analyzed using immunochemiluminometric assay. Logistic regression for CPP was performed. The best predictor of CPP is the E2-change model based on 3- to 24-h values, providing 80% sensitivity and 87% specificity. Three-hour luteinizing hormone (LH) provided 75% sensitivity and 87% specificity. Basal LH lowered sensitivity to 65% and specificity to 53%. The E2-change model provided the best predictive power; however, 3-h LH was more practical and convenient when evaluating puberty in girls.

  3. Early puberty in internationally adopted girls: hormonal and clinical markers of puberty in 276 girls examined biannually over two years

    DEFF Research Database (Denmark)

    Teilmann, Grete; Petersen, Jørgen H; Gormsen, Magdalena

    2009-01-01

    Retrospective studies have indicated that internationally adopted girls are at high risk of developing precocious puberty. Hypothetically, this could be due to selection bias. The aim of this study was to determine age at reaching pubertal milestones in healthy internationally adopted girls...

  4. Evaluation and Referral of Children With Signs of Early Puberty.

    Science.gov (United States)

    Kaplowitz, Paul; Bloch, Clifford

    2016-01-01

    Concerns about possible early pubertal development are a common cause for referral to pediatric medical subspecialists. Several recent studies have suggested that onset of breast and/or pubic hair development may be occurring earlier than in the past. Although there is a chance of finding pathology in girls with signs of puberty before 8 years of age and in boys before 9 years of age, the vast majority of these children with signs of apparent puberty have variations of normal growth and physical development and do not require laboratory testing, bone age radiographs, or intervention. The most common of these signs of early puberty are premature adrenarche (early onset of pubic hair and/or body odor), premature thelarche (nonprogressive breast development, usually occurring before 2 years of age), and lipomastia, in which girls have apparent breast development which, on careful palpation, is determined to be adipose tissue. Indicators that the signs of sexual maturation may represent true, central precocious puberty include progressive breast development over a 4- to 6-month period of observation or progressive penis and testicular enlargement, especially if accompanied by rapid linear growth. Children exhibiting these true indicators of early puberty need prompt evaluation by the appropriate pediatric medical subspecialist. Therapy with a gonadotropin-releasing hormone agonist may be indicated, as discussed in this report. Copyright © 2016 by the American Academy of Pediatrics.

  5. Nocturnal Urinary Excretion of FSH and LH in Children and Adolescents With Normal and Early Puberty.

    Science.gov (United States)

    Kolby, Nanna; Busch, Alexander S; Aksglaede, Lise; Sørensen, Kaspar; Petersen, Jorgen Holm; Andersson, Anna-Maria; Juul, Anders

    2017-10-01

    Clinical use of single serum gonadotropin measurements in children is limited by the pulsatile secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH). However, first morning voided (FMV) urine may integrate the fluctuating gonadotropin serum levels. We aimed to evaluate urinary and serum gonadotropin levels according to age, sex, and pubertal stage in healthy children and to assess the clinical use of FMV urinary gonadotropins in children with disordered puberty. Cross-sectional part of the COPENHAGEN Puberty Study and longitudinal study of patients. Population-based and outpatient clinic. Eight hundred forty-three healthy children from the COPENHAGEN Puberty Study and 25 girls evaluated for central precocious puberty (CPP). Clinical pubertal staging, including serum and urinary gonadotropin levels. Urinary gonadotropins increased with advancing age and pubertal development and were detectable in FMV urine before physical signs of puberty. FMV urinary LH correlated strongly with basal (r = 0.871, P 5 IU/L). Urinary concentrations of LH decreased after 3 months of GnRH treatment to levels below +2 SDs. Urinary gonadotropin levels increased before the onset of puberty and were elevated in girls with CPP. We suggest urinary LH as an alternative noninvasive method to improve diagnosing and therapeutic management of children with disordered puberty. Copyright © 2017 Endocrine Society

  6. Precocious puberty secondary to a mixed germ cell-sex cord-stromal tumor associated with an ovarian yolk sac tumor: a case report

    Directory of Open Access Journals (Sweden)

    Metwalley Kotb

    2012-06-01

    Full Text Available Abstract Introduction Ovarian tumors are the least common cause of sexual precocity in girls. Mixed germ cell-sex cord-stromal tumors associated with a yolk sac tumor of the ovary are rare neoplasms, of which only a small number of well-documented cases have been described so far. Here, we report precocious puberty in a four-year-old Egyptian girl caused by a mixed germ cell-sex cord-stromal tumor associated with a yolk sac tumor of the ovary. Case presentation A four-year-old Egyptian girl was referred to our pediatric endocrinology unit for evaluation of bilateral breast budding, pubic hair and vaginal bleeding. On examination, we found that her breast enlargement and pubic hair were compatible with Tanner III. A thorough workup revealed a large mass in her right ovary. Magnetic resonance imaging ofher brain showed that her pituitary gland was normal. A hormonal assay revealed high levels of estradiol, 280 to 375pmol/L; progesterone, 5.3 nmol/L; testosterone 38.9 pg/mL; and androstenedione, 4.1 ng/mL. Her basal and stimulated levels of luteinizing hormone and follicle-stimulating hormone were low. Tumor markers levels were high, with a total inhibin of 1,069U/L and an alpha-fetoprotein of 987 μg/L. Her chromosomes were normal (46XX. Our patient underwent an explorative laparotomy and a solid tumor localized to her right ovary was identified. A right salpingo-oophorectomy was performed and the histopathological diagnosis was a mixed germ cell-sex cord-stromal tumorwith a yolk sac tumor of the ovary. Postoperatively, she was started on treatment with chemotherapy. Our patient is doing well without evidence of tumor recurrence or metastasis during eight months of postoperative follow-up. Conclusion Although a mixed germ cell-sex cord-stromal tumor associated with a yolk sac tumor of the ovary is a rare occurrence, it should be considered in the differential diagnosis for a prepubescent girl with an abdominal mass and precocious puberty.

  7. [Age of onset of puberty in Chilean boys according to testicular volume and Tanner stage].

    Science.gov (United States)

    Gaete, Ximena; García, Roberto; Riquelme, Joel; Codner, Ethel

    2015-03-01

    A secular trend towards a younger age of puberty onset has been reported in Chilean girls. To evaluate the age of onset of puberty and prevalence of early puberty in Chilean boys. A pediatric endocrinologist examined 319 children attending schools in central Santiago. Pubertal development was assessed by testicular volume (TV) and genital inspection (GI) using Tanner graduation. Precocious and early puberty development was diagnosed if TV ≥ 4 ml or GI > stage 2 occurred in boys younger than 9 years and at 9-10 years of age, respectively. Pubertal onset occurred at 10.2 ± 1.5 years according to TV and at 11.1 ± 1.6 years according to GI (p puberty was observed in 23.8% of children according to TV and 9.5% according to GI. However, no child of less than 11 years old had a TV ≥ 4 ml, genital changes and pubic hair simultaneously. Late pubertal stages occurred at the same age according to both criteria used. Body mass index z score was not associated with the age of pubertal onset. Testicular enlargement occurs one year earlier than changes in genitalia according to inspection. Testicular growth, but not late stages of puberty, are occurring one year earlier than previously reported in Chile 10 years ago.

  8. The timing of normal puberty and the age limits of sexual precocity

    DEFF Research Database (Denmark)

    Parent, Anne-Simone; Teilmann, Grete; Juul, Anders

    2003-01-01

    During the past decade, possible advancement in timing of puberty has been reported in the United States. In addition, early pubertal development and an increased incidence of sexual precocity have been noticed in children, primarily girls, migrating for foreign adoption in several Western European...... countries. These observations are raising the issues of current differences and secular trends in timing of puberty in relation to ethnic, geographical, and socioeconomic background. None of these factors provide an unequivocal explanation for the earlier onset of puberty seen in the United States....... In the formerly deprived migrating children, refeeding and catch-up growth may prime maturation. However, precocious puberty is seen also in some nondeprived migrating children. Attention has been paid to the changing milieu after migration, and recently, the possible role of endocrine- disrupting chemicals from...

  9. Disease: H01860 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available GnRH. Hypersecretion of gonadotropins are often associated with pituitary adenomas (H01102) and central precocious puberty...infertility, and loss of some male characteristics. Endocrine disease ... See also H01102 Pituitary adenomas, H00937 Precocious pub...erty, H00255 Hypogonadotropic hypogonadism, and H01700 Hypopituitarism. ICD-10: E23

  10. Psychosexual development, maternalism, nonpromiscuity, and body image in 15 females with precocious puberty.

    Science.gov (United States)

    Money, J; Walker, P A

    1971-03-01

    Fifteen females with a history of idiopathic sexual precocity were selected without known sampling bias. They had been followed for as long as 18 years. They showed various behavioral characteristics as a group, but were also individually unique. If the IQ permitted, they benefited socially from school acceleration. Left to their own devices, the majority preferred friends nearer to them in physique age rather than chronologic age. Play interests, though influenced by the age of playmates, showed no features unique to the precocious onset of hormonal puberty. About half of the girls had occasional moody or depressed spells and wanted to be left alone. Maternalistic interests were strongly represented; only one girl was a tomboy. Masturbation and sexual play in childhood were rarely confirmed, and in no instances were totally contrary to family or community mores. No consistent progression of erotic dream content was discerned. Dreams of having a baby were rare, but antedated intercourse dreams, which were also rarely reported and did not include sensations of climax. Whereas the youngest age of having a serious boyfriend was 8 years, and the youngest age of intercourse, 11, the majority of girls did not report romantic and sexual involvements before the middle teenage years or later. In the three instances of marriage, the youngest was at age 21. Motherhood has so far been achieved by only one patient. She delivered her first child at age 11. The visible appearance of early sexual development and early advanced statural growth created a problem in childhood human relationships for most of the girls, regardless of what they said, and regardless of their skill or ineptitude in handling it. They all benefited even from minimal counseling, as did their parents. Early appearance of physical sexual development does not automatically lead to premature engagement in erotic activity or promiscuous sexual behavior. Such activity and behavior require appropriate experience

  11. Hypothesis: exposure to endocrine-disrupting chemicals may interfere with timing of puberty

    DEFF Research Database (Denmark)

    Mouritsen, A; Aksglaede, L; Sørensen, K

    2010-01-01

    A recent decline in onset of puberty - especially among girls - has been observed, first in the US in the mid-1990s and now also in Europe. The development of breast tissue in girls occurs at a much younger age and the incidence of precocious puberty (PP) is increasing. Genetic factors...... of normal puberty are poorly understood. This hampers investigation of the possible role of environmental influences. There are many types of EDCs. One chemical may have more than one mode of action and the effects may depend on dose and duration of the exposure, as well as the developmental stage...... in life. Most known EDCs have oestrogenic and/or anti-androgenic actions and only few have androgenic or anti-oestrogenic effects. Thus, it appears plausible that they interfere with normal onset of puberty. The age at menarche has only declined by a few months whereas the age at breast development has...

  12. A new pathway in the control of the initiation of puberty: the MKRN3 gene.

    Science.gov (United States)

    Abreu, Ana Paula; Macedo, Delanie B; Brito, Vinicius N; Kaiser, Ursula B; Latronico, Ana Claudia

    2015-06-01

    Pubertal timing is influenced by complex interactions among genetic, nutritional, environmental, and socioeconomic factors. The role of MKRN3, an imprinted gene located in the Prader-Willi syndrome critical region (chromosome 15q11-13), in pubertal initiation was first described in 2013 after the identification of deleterious MKRN3 mutations in five families with central precocious puberty (CPP) using whole-exome sequencing analysis. Since then, additional loss-of-function mutations of MKRN3 have been associated with the inherited premature sexual development phenotype in girls and boys from different ethnic groups. In all of these families, segregation analysis clearly demonstrated autosomal dominant inheritance with complete penetrance, but with exclusive paternal transmission, consistent with the monoallelic expression of MKRN3 (a maternally imprinted gene). Interestingly, the hypothalamic Mkrn3 mRNA expression pattern in mice correlated with a putative inhibitory input on puberty initiation. Indeed, the initiation of puberty depends on a decrease in factors that inhibit the release of GnRH combined with an increase in stimulatory factors. These recent human and animal findings suggest that MKRN3 plays an inhibitory role in the reproductive axis to represent a new pathway in pubertal regulation. © 2015 Society for Endocrinology.

  13. Association of PAEs with Precocious Puberty in Children: A Systematic Review and Meta-Analysis

    Directory of Open Access Journals (Sweden)

    Yi Wen

    2015-12-01

    Full Text Available Background: Precocious puberty (PP currently affects 1 in 5000 children and is 10 times more common in girls. Existing studies have tried to detect an association between phathalic acid esters (PAEs and PP, but the results did not reach a consensus. Objective: To estimate the association between PAEs and children with PP based on current evidence. Methods: Databases including PubMed (1978 to March 2015, OVID (1946 to March 2015, Web of Science (1970 to March 2015, EBSCO (1976 to March 2015, CNKI (1979 to March 2015, WANFANG DATA (1987 to March 2015, CBM (1978 to March 2015 and CQVIP (1989 to March 2015 were searched to identify all case-control studies that determined the exposure and concentration of PAEs and their metabolites in children with PP. Meta-analysis of the pooled standard mean difference (SMD and odds ratio (OR with 95% confidence intervals (CI were calculated. Results: A total of 14 studies involving 2223 subjects were finally included. The pooled estimates showed that PP was associated with di-(2-ethylhexyl-phthalate (DEHP exposure (OR: 3.90, 95% CI: 2.77 to 5.49. Besides, the concentration of DEHP (SMD: 1.73, 95% CI: 0.54 to 2.91 and di-n-butyl phthalate (DBP (SMD: 4.31, 95% CI: 2.67 to 5.95 in the PP group were significantly higher than those in the control group, respectively, while no difference was detected between case and control groups in either serum or urinary concentration of mono-(2-ethylhexyl-phthalate (MEHP, monobutyl phthalate (MBP, mono(2-ethyl-5-oxohexyl phthalate(MEOHP, mono-(2-ethyl-5-carboxypentyl phthalate (MECPP, monomethyl phthalate (MMP, monobenzyl phthalate (MBzP or monoethyl phthalate (MEP. Conclusions: Exposure of DEHP and DBP might be associated with PP risk for girls, however, there is no evidence to show an association between the exposure to most PAE metabolites and PP. Given the moderate strength of the results, well-designed cohort studies with large sample size should be performed in future.

  14. Growth and puberty after treatment for acute lymphoblastic leukemia

    Directory of Open Access Journals (Sweden)

    Alves Claudia Helena Bastos da Silva

    2004-01-01

    Full Text Available Over the last 20 years, after combining treatment of chemotherapy and radiotherapy, there has been an improvement in the survival rate of acute lymphoblastic leukemia patients, with a current cure rate of around 70%. Children with the disease have been enrolled into international treatment protocols designed to improve survival and minimize the serious irreversible late effects. Our oncology unit uses the international protocol: GBTLI LLA-85 and 90, with the drugs methotrexate, cytosine, arabinoside, dexamethasone, and radiotherapy. However, these treatments can cause gonadal damage and growth impairment. PATIENTS AND METHOD: The authors analyzed 20 children off therapy in order to determine the role of the various doses of radiotherapy regarding endocrinological alterations. They were divided into 3 groups according to central nervous system prophylaxis: Group A underwent chemotherapy, group B underwent chemotherapy plus radiotherapy (18 Gy, and group C underwent chemotherapy plus radiotherapy (24 Gy. Serum concentrations of LH, FSH, GH, and testosterone were determined. Imaging studies included bone age, pelvic ultrasound and scrotum, and skull magnetic resonance imaging. RESULTS: Nine of the patients who received radiotherapy had decreased pituitary volume. There was a significant difference in the response to GH and loss of predicted final stature (Bayley-Pinneau between the 2 irradiated groups and the group that was not irradiated, but there was no difference regarding the radiation doses used (18 or 24 Gy. The final predicted height (Bayley-Pinneau was significantly less (P = 0.0071 in both groups treated with radiotherapy. Two girls had precocious puberty, and 1 boy with delayed puberty presented calcification of the epididymis. CONCLUSION: Radiotherapy was been responsible for late side effects, especially related to growth and puberty.

  15. Hypothesis: exposure to endocrine-disrupting chemicals may interfere with timing of puberty

    DEFF Research Database (Denmark)

    Mouritsen, A; Aksglaede, L; Sørensen, K

    2010-01-01

    and increasing prevalence of adiposity may contribute, but environmental factors are also likely to be involved. In particular, the widespread presence of endocrine-disrupting chemicals (EDCs) is suspected to contribute to the trend of earlier pubertal onset. The factors regulating the physiological onset...... of normal puberty are poorly understood. This hampers investigation of the possible role of environmental influences. There are many types of EDCs. One chemical may have more than one mode of action and the effects may depend on dose and duration of the exposure, as well as the developmental stage......A recent decline in onset of puberty - especially among girls - has been observed, first in the US in the mid-1990s and now also in Europe. The development of breast tissue in girls occurs at a much younger age and the incidence of precocious puberty (PP) is increasing. Genetic factors...

  16. Insulin resistance, obesity, hypofibrinolysis, hyperandrogenism, and coronary heart disease risk factors in 25 pre-perimenarchal girls age < or =14 years, 13 with precocious puberty, 23 with a first-degree relative with polycystic ovary syndrome.

    Science.gov (United States)

    Glueck, Charles J; Morrison, John A; Wang, Ping

    2008-10-01

    Pre-peri-menarchal diagnosis of polycystic ovary syndrome (PCOS) is important, because intervention with metformin-diet may prevent progression to full blown PCOS. In 25 girls age PCOS, 10 pre-, 15 post-menarchal, 13 with precocious puberty, 23 with a first-degree relative with PCOS, we hypothesized that reversible coronary heart disease (CHD) risk factors, insulin resistance, clinical and biochemical hyperandrogenism, and hypofibrinolysis were already established. Fasting measures: insulin, glucose, total, LDL- (LDL-C), and HDL-cholesterol (HDL-C), triglycerides (TG), systolic and diastolic blood pressure (SBP, DBP), plasminogen activator inhibitor activity (PAI-Fx), total (T) and free testosterone (FT), androstenedione, and DHEAS. Clinical and/or biochemical hyperandrogenism was present in all 25 girls, with elevations of T or FT, or androstenedione in seven of ten pre-menarchal girls and in all 15 post-menarche. PAI-Fx was high in 28% of the 25 girls vs 6.5% in age-gender-race matched controls (p = 0.013). Categorized by race-age-specific distributions in 870 schoolgirls, the 25 girls with probable familial PCOS were more likely to have top decile body mass index (BMI), insulin, HOMA-insulin resistance (HOMA-IR), SBP, DBP, and TG, and bottom decile HDL-C. By analysis of variance, adjusting for race, age and BMI, PCOS girls had higher FT and waist circumference than controls, but did not differ for SBP, DBP, HDL-C, or TG (p>0.05). Pre-peri-menarchal acquisition of centripetal obesity amplifies CHD risk factors and hypofibrinolysis in hyperandrogenemic girls with probable familial PCOS and precocious puberty. When schoolgirls become as obese as girls with probable familial PCOS, they acquire the same CHD risk factors, and differ only by lower free T and less centripetal obesity.

  17. Bone mineral density and body composition before and during treatment with gonadotropin-releasing hormone agonist in children with central precocious and early puberty

    NARCIS (Netherlands)

    A.M. Boot (Annemieke); S.M.P.F. de Muinck Keizer-Schrama (Sabine); H.A.P. Pols (Huib); E.P. Krenning (Eric); S.L.S. Drop (Stenvert)

    1998-01-01

    textabstractMajor changes in bone mineral density (BMD) and body composition occur during puberty. In the present longitudinal study, we evaluated BMD and calculated volumetric BMD [bone mineral apparent density (BMAD)], bone metabolism, and body composition of children

  18. Diagnostic work-up of 449 consecutive girls who were referred to be evaluated for precocious puberty

    DEFF Research Database (Denmark)

    Mogensen, Signe Sloth; Aksglaede, Lise; Mouritsen, Annette

    2011-01-01

    A decrease in age at pubertal onset has been observed internationally. The aim of this study was to describe a large cohort of Caucasian girls referred with signs of early puberty according to etiology and compare biochemical characteristics.......A decrease in age at pubertal onset has been observed internationally. The aim of this study was to describe a large cohort of Caucasian girls referred with signs of early puberty according to etiology and compare biochemical characteristics....

  19. Improved final predicted height with the injection of leuprolide in children with earlier puberty: A retrospective cohort study.

    Directory of Open Access Journals (Sweden)

    Yi-Chun Lin

    Full Text Available The adult height of children with early onset puberty is limited by the premature maturation of hypothalamic-pituitary-gonadal axis. To evaluate the effects of gonadotropin-releasing hormone analog (GnRHa treatment on the final height (FH and bone maturation rate (BMR in girls with early puberty (EP or idiopathic central precocious puberty (ICPP, we examined data from girls who were diagnosed with EP or ICPP and underwent GnRHa (Leuplin Depot: 3.75 mg/month at China Medical University Hospital, in Taiwan, between 2006 and 2015. Patients were observed until the achievement of FH and divided into an "EP group" (T-ep and "ICPP group" (T-icpp according to the age of onset of puberty. Eighty-seven patients were enrolled (T-ep, N = 44, puberty onset at 8-10 years; T-icpp, N = 43, puberty onset before 8 years. The demographic data of girls with EP or IPP was characterized. BMR, change in predicted final height (PFH after GnRHa treatment, target height (TH and FH were measured. After GnRHa treatment, the study groups (T-ep: 160.24±6.18 cm, T-icpp: 158.99±5.92 cm both had higher PFH than at initiation (T-ep: 159.83±7.19 cm, T-icpp: 158.58±5.93 cm. There was deceleration of BMR in both groups (T-ep: 0.57±0.39; T-icpp: 0.97±0.97 and a significant difference between the groups (p = 0.027. The gap in FH standard deviation scores (SDS and TH SDS had a significant difference in T-ep (p = 0.045 but not in T-icpp. Moreover, there was no difference in the gap of PFH SDS between the 1st and final treatment in both groups. We concluded that GnRHa decelerated BMR in girls with earlier puberty. Further prospective clinical studies are warranted.

  20. Neoplastic causes of abnormal puberty.

    Science.gov (United States)

    Wendt, Susanne; Shelso, John; Wright, Karen; Furman, Wayne

    2014-04-01

    Neoplasm-related precocious puberty (PP) is a rare presenting feature of childhood cancer. Moreover, evaluation of suspected PP in a child is complex, and cancer is often not considered. We characterized the clinicopathologic features of patients presenting with PP at a large pediatric cancer center, reviewed the relevant literature, and developed an algorithm for the diagnostic work-up of these patients. We examined the records of all patients with a neoplasm and concomitant PP treated at St. Jude Children's Research Hospital from January 1975 through October 2011, reviewed the available literature, and analyzed the demographic, clinical, endocrine, and neoplasm-related features. Twenty-four of 13,615 children and adolescents (0.18%) were diagnosed with PP within 60 days of presentation. Primary diagnoses included brain tumor (12), adrenocortical carcinoma (5), hepatoblastoma (4), and others (3). PP was observed 0-48 months before diagnosis of neoplasm; 17 patients had peripheral PP and 7 had central PP. Neoplasm-related PP is rare and takes the form of a paraneoplastic syndrome caused by tumor production of hormones or by alteration of physiologic gonadotropin production. PP can precede diagnosis of malignancy by months or years, and neoplastic causes should be considered early to avoid delayed cancer diagnosis. Treatment of the primary malignancy resolved or diminished PP in surviving patients with an intact hypothalamic-pituitary-gonadal axis. © 2013 Wiley Periodicals, Inc.

  1. Male patients presenting with rapidly progressive puberty associated with malignant tumors

    Directory of Open Access Journals (Sweden)

    Soo Jung Kim

    2016-03-01

    Full Text Available In males, precocious puberty (PP is defined as the development of secondary sexual characteristics before age 9 years. PP is usually idiopathic; though, organic abnormalities including tumors are more frequently found in male patients with PP. However, advanced puberty in male also can be an important clinical manifestation in tumors. We report 2 cases of rapidly progressive puberty in males, each associated with a germ-cell tumor. First, an 11-year-old boy presented with mild fever and weight loss for 1 month. Physical examination revealed a pubertal stage of G3P3 with 10-mL testes. Investigations revealed advanced bone age (16 years with elevated basal luteinizing hormone and testosterone levels. An anterior mediastinal tumor was identified by chest radiography and computed tomography, and elevated α-fetoprotein (AFP and β-human chorionic gonadotropin (β-hCG levels were noted. Histopathologic analysis confirmed a yolk-sac tumor. Second, a 12-year-old boy presented with diplopia, polydipsia, and polyuria for 4 months. Physical examination revealed a pubertal stage of G3P3 with 8-mL testes. Bone age was advanced (16 years and laboratory tests indicated panhypopituitarism with elevated testosterone level. A mixed germ-cell tumor was diagnosed with elevated AFP and β-hCG levels. Of course, these patients also have other symptoms of suspecting tumors, however, rapidly progressive puberty can be the more earlier screening sign of tumors. Therefore, in male patients with accelerated or advanced puberty, malignancy should be considered, with evaluation of tumor markers. In addition, advanced puberty in male should be recognized more widely as a unique sign of neoplasm.

  2. [Neuroendocrine mechanisms of puberty onset].

    Science.gov (United States)

    Teinturier, C

    2002-10-01

    An increase in pulsatile release of GnRH is essential for the onset of puberty. However, the mechanism controlling the pubertal increase in GnRH release is still unclear. The GnRH neurosecretory system is already active during the neonatal period but subsequently enters a dormant state by central inhibition in the juvenile period. When this central inhibition is removed or diminished, an increase in GnRH release occurs with increase in synthesis and release of gonadotropins and gonadal steroids, followed by the appearance of secondary sexual characteristics. Recent studies suggest that disinhibition of GnRH neurons from GABA (gamma-aminobutyric acid) appears to be a critical factor in female rhesus monkey. After central inhibition is removed, increases in stimulatory input from glutamatergic neurons as well as new stimulatory input from norepinephrine and NPY neurons and inhibitory input from beta endorphin neurons appear to control pulsatile GnRH release as well as gonadal steroids. Nonetheless, the most important question still remains: what determines the timing to remove central inhibition? Because many genes are turned on or turned off to establish a complex series of events occurring during puberty, the timing of puberty must be regulated by a master gene or genes, as a part of developmental events.

  3. Precocious puberty

    Science.gov (United States)

    ... Surgery to remove a tumor. Children with early sexual development may have psychological and social problems. Children and ... to be the same as their peers. Early sexual development can make them appear different. Parents can support ...

  4. The timing of normal puberty and the age limits of sexual precocity: variations around the world, secular trends, and changes after migration.

    Science.gov (United States)

    Parent, Anne-Simone; Teilmann, Grete; Juul, Anders; Skakkebaek, Niels E; Toppari, Jorma; Bourguignon, Jean-Pierre

    2003-10-01

    During the past decade, possible advancement in timing of puberty has been reported in the United States. In addition, early pubertal development and an increased incidence of sexual precocity have been noticed in children, primarily girls, migrating for foreign adoption in several Western European countries. These observations are raising the issues of current differences and secular trends in timing of puberty in relation to ethnic, geographical, and socioeconomic background. None of these factors provide an unequivocal explanation for the earlier onset of puberty seen in the United States. In the formerly deprived migrating children, refeeding and catch-up growth may prime maturation. However, precocious puberty is seen also in some nondeprived migrating children. Attention has been paid to the changing milieu after migration, and recently, the possible role of endocrine- disrupting chemicals from the environment has been considered. These observations urge further study of the onset of puberty as a possible sensitive and early marker of the interactions between environmental conditions and genetic susceptibility that can influence physiological and pathological processes.

  5. Consensus statement on the use of gonadotropin-releasing hormone analogs in children

    DEFF Research Database (Denmark)

    Carel, Jean-Claude; Eugster, Erica A; Rogol, Alan

    2009-01-01

    , an equal male/female ratio, and a balanced spectrum of professional seniority and expertise. EVIDENCE: Preference was given to articles written in English with long-term outcome data. The US Public Health grading system was used to grade evidence and rate the strength of conclusions. When evidence......OBJECTIVE: Gonadotropin-releasing hormone analogs revolutionized the treatment of central precocious puberty. However, questions remain regarding their optimal use in central precocious puberty and other conditions. The Lawson Wilkins Pediatric Endocrine Society and the European Society...... for Pediatric Endocrinology convened a consensus conference to review the clinical use of gonadotropin-releasing hormone analogs in children and adolescents. PARTICIPANTS: When selecting the 30 participants, consideration was given to equal representation from North America (United States and Canada) and Europe...

  6. Putative effects of endocrine disrupters on pubertal development in the human

    DEFF Research Database (Denmark)

    Teilmann, Grete; Juul, Anders; Skakkebaek, Niels E

    2002-01-01

    developing countries to industrialized countries often develop precocious puberty. Not only precocious puberty, but also delayed puberty can, theoretically, be associated with exposure to endocrine disrupters. While it is very plausible that endocrine disrupters may disturb pubertal development...

  7. Putative effects of endocrine disrupters on pubertal development in the human

    DEFF Research Database (Denmark)

    Teilmann, Grete; Juul, Anders; Skakkebaek, Niels E

    2002-01-01

    -called endocrine disrupters. Precocious puberty has been described in several case reports of accidental exposure to oestrogenic compounds in cosmetic products, food and pharmaceuticals. Local epidemics of premature thelarche have also been suggested to be linked to endocrine disrupters. Children adopted from...... developing countries to industrialized countries often develop precocious puberty. Not only precocious puberty, but also delayed puberty can, theoretically, be associated with exposure to endocrine disrupters. While it is very plausible that endocrine disrupters may disturb pubertal development...

  8. Altricial-precocial spectra in animal kingdom

    NARCIS (Netherlands)

    Augustine, Starrlight; Lika, Konstadia; Kooijman, Sebastiaan A.L.M.

    2018-01-01

    Traditionally, the terms altricial and precocial are used to described the state at birth of birds and mammals. We suggest an explanation for why birds evolved from precocial to altricial and mammals from altricial to precocial. However, the concept is not confined to these groups alone and is an

  9. Epigenetic regulation of female puberty.

    Science.gov (United States)

    Lomniczi, Alejandro; Wright, Hollis; Ojeda, Sergio R

    2015-01-01

    Substantial progress has been made in recent years toward deciphering the molecular and genetic underpinnings of the pubertal process. The availability of powerful new methods to interrogate the human genome has led to the identification of genes that are essential for puberty to occur. Evidence has also emerged suggesting that the initiation of puberty requires the coordinated activity of gene sets organized into functional networks. At a cellular level, it is currently thought that loss of transsynaptic inhibition, accompanied by an increase in excitatory inputs, results in the pubertal activation of GnRH release. This concept notwithstanding, a mechanism of epigenetic repression targeting genes required for the pubertal activation of GnRH neurons was recently identified as a core component of the molecular machinery underlying the central restraint of puberty. In this chapter we will discuss the potential contribution of various mechanisms of epigenetic regulation to the hypothalamic control of female puberty. Copyright © 2014 Elsevier Inc. All rights reserved.

  10. Drug: D00989 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available 640] Central precocious puberty [DS:H00937] - Orphan drug designation ... GNRHR [H...tor agonist Therapeutic category: 2499 ATC code: L02AE02 Chemical group: DG00730 Uterine leiomyomata [DS:H01

  11. Puberty in girls

    Science.gov (United States)

    Well child - puberty in girls; Development - puberty in girls; Menstruation - puberty in girls; Breast development - puberty in girls ... a year. When you are done going through puberty, you will be almost as tall as you ...

  12. Association between Small Fetuses and Puberty Timing: A Systematic Review and Meta-Analysis.

    Science.gov (United States)

    Deng, Xu; Li, Wenyan; Luo, Yan; Liu, Shudan; Wen, Yi; Liu, Qin

    2017-11-13

    Background : Epidemiological studies reporting the effect of small fetuses (SF) on puberty development have shown inconsistent results. Objective : To examine current study evidence and determine the strength and direction of the association between SF and puberty timing. Methods : PubMed, OVID, Web of Science, EBSCO, and four Chinese databases were searched from their date of inception to February 2016. All cohort studies that examined the association between SF and puberty timing in children were identified. Two reviewers independently screened the studies, assessed the quality of included studies, and extracted the data. The quality of the included cohort studies was assessed by the Newcastle-Ottawa Scale. Risk ratio (RR), Weighted Mean Difference (WMD), and 95% confidence intervals (CIs) were calculated and pooled by RevMan5.3 (Cochrane Collaboration, London, UK). Results : A total of 10 cohort studies involving 2366 subjects was included in the final analysis. The pooled estimates showed that SF did not significantly increase the number of pubertal children in boys (RR: 0.97; 95% CI: 0.82 to 1.15), or in girls (RR: 0.91; 95% CI: 0.79 to 1.04). Compared with the control group, the SF group had an earlier onset of puberty in girls (WMD: -0.64; 95% CI: -1.21 to -0.06), and in precocious pubarche (PP) girls (WMD: -0.10; 95% CI: -0.13 to -0.07). There was no difference in the onset of puberty in boys (WMD: -0.48; 95% CI: -1.45 to 0.50) between SF and control groups. The pooled result indicated an earlier age at menarche in girls born small for gestational age (WMD: -0.30; 95% CI: -0.58 to -0.03), but no difference in the age at menarche in the SF group of PP girls. Conclusions : SF may be associated with an earlier age of onset of puberty, especially among girls, as well as earlier age at menarche for girls. Well-designed studies with larger sample sizes and long-term follow-up among different countries and ethnicities are needed.

  13. Evaluation of GnRH analogue testing in diagnosis and management of children with pubertal disorders

    Directory of Open Access Journals (Sweden)

    Hemchand K Prasad

    2012-01-01

    Full Text Available Context: Gonadotrophin releasing hormone (GnRH stimulation test is pivotal in the assessment of children with pubertal disorders. However, lack of availability and high cost often result in the test falling into disfavor. We routinely use the GnRH analogue stimulation test as an alternative at our center. Aim: To present the data on children with endocrine disorders who underwent GnRH agonist stimulation test in pediatric endocrine clinic of a tertiary care referral hospital. Setting and Design: Pediatric endocrine clinic of a tertiary care referral hospital. Retrospective analysis of case records. Materials and Methods: The details pertaining to clinical and radiological parameters and hormonal tests were retrieved from case records of 15 children who underwent GnRH agonist stimulation test from May 2010 to April 2011. Results: Indications for testing with GnRH analogue were evaluation of delayed puberty, diagnosis of precocious puberty, assessment of hormonal suppression in treatment of precocious puberty and micropenis in two, nine, three and one cases, respectively. The results of the test and clinical and radiological parameters were in concordance. The test was also crucial in diagnosing the onset of central precocious puberty in two children with congenital adrenal hyperplasia. Conclusion: GnRH agonist test is a convenient, safe test that can be performed on an out-patient basis and can help the clinicians in the correct diagnosis and appropriate treatment of various puberty-related disorders.

  14. Metabolic control of female puberty: potential therapeutic targets.

    Science.gov (United States)

    Castellano, Juan M; Tena-Sempere, Manuel

    2016-10-01

    The onset of puberty in females is highly sensitive to the nutritional status and the amount of energy reserves of the organism. This metabolic information is sensed and transmitted to hypothalamic GnRH neurons, considered to be ultimately responsible for triggering puberty through the coordinated action of different peripheral hormones, central neurotransmitters, and molecular mediators. This article will review and discuss (i) the relevant actions of the adipose hormone leptin, as a stimulatory/permissive signal, and the gut hormone ghrelin, as an inhibitory factor, in the metabolic control of female puberty; (ii) the crucial role of the hypothalamic kisspeptin neurons, recently emerged as essential gatekeepers of puberty, in transmitting this metabolic information to GnRH neurons; and (iii) the potential involvement of key cellular energy sensors, such as mTOR, as molecular mediators in this setting. The thorough characterization of the physiological roles of the above elements in the metabolic control of female puberty, along with the discovery of novel factors, pathways, and mechanisms involved, will promote our understanding of the complex networks connecting metabolism and puberty and, ultimately, will aid in the design of target-specific treatments for female pubertal disorders linked to conditions of metabolic stress.

  15. Delayed Puberty

    Science.gov (United States)

    ... DPeulbayeertdy What Parents Need to Know What is puberty? Puberty is the time of life when a child’s body matures into an adult’s. • For girls, puberty can start as early as age 7½ years ...

  16. Early and late endocrine effects in pediatric central nervous system diseases.

    Science.gov (United States)

    Aslan, Ivy R; Cheung, Clement C

    2014-01-01

    Endocrinopathies are frequently linked to central nervous system disease, both as early effects prior to the disease diagnosis and/or late effects after the disease has been treated. In particular, tumors and infiltrative diseases of the brain and pituitary, such as craniopharyngioma, optic pathway and hypothalamic gliomas, intracranial germ cell tumor, and Langerhans cell histiocytosis, can present with abnormal endocrine manifestations that precede the development of neurological symptoms. Early endocrine effects include diabetes insipidus, growth failure, obesity, and precocious or delayed puberty. With improving prognosis and treatment of childhood brain tumors, many survivors experience late endocrine effects related to medical and surgical interventions. Chemotherapeutic agents and radiation therapy can affect the hypothalamic-pituitary axes governing growth, thyroid, gonadal, and adrenal function. In addition, obesity and metabolic alterations are frequent late manifestations. Diagnosing and treating both early and late endocrine manifestations can dramatically improve the growth, well-being, and quality of life of patients with childhood central nervous system diseases.

  17. Neurokinin B receptor antagonism decreases luteinising hormone pulse frequency and amplitude and delays puberty onset in the female rat.

    Science.gov (United States)

    Li, S Y; Li, X F; Hu, M H; Shao, B; Poston, L; Lightman, S L; O'Byrne, K T

    2014-08-01

    The neural mechanisms controlling puberty onset remain enigmatic. Humans with loss of function mutations in TAC3 or TACR3, the genes encoding neurokinin B (NKB) or its receptor, neurokinin-3 receptor (NK3R), respectively, present with severe congenital gonadotrophin deficiency and pubertal failure. Animal studies have shown ambiguous actions of NKB-NK3R signalling with respect to controlling puberty onset. The present study aimed to determine the role of endogenous NKB-NK3R signalling in the control of pulsatile luteinising hormone (LH) secretion and the timing of puberty onset, and also whether precocious pubertal onset as a result of an obesogenic diet is similarly regulated by this neuropeptide system. Prepubertal female rats, chronically implanted with i.c.v. cannulae, were administered SB222200, a NK3R antagonist, or artificial cerebrospinal fluid via an osmotic mini-pump for 14 days. SB222200 significantly delayed the onset of vaginal opening and first oestrus (as markers of puberty) compared to controls in both normal and high-fat diet fed animals. Additionally, serial blood sampling, via chronic indwelling cardiac catheters, revealed that the increase in LH pulse frequency was delayed and that the LH pulse amplitude was reduced in response to NK3R antagonism, regardless of dietary status. These data suggest that endogenous NKB-NK3R signalling plays a role in controlling the timing of puberty and the associated acceleration of gonadotrophin-releasing hormone pulse generator frequency in the female rat. © 2014 British Society for Neuroendocrinology.

  18. EFFECT OF EXOGENOUS GLUTAMATE SUPPLY ON THE ONSET OF PUBERTY IN GOATS: I. SERUM LEVELS OF INSULIN

    Directory of Open Access Journals (Sweden)

    Miriam Torres-Moreno

    2009-02-01

    Full Text Available Glutamate, the main neuroexcitatory amino acid of the central nervous system has a marked stimulatory effect on the reproductive axis in mammals. Precocious puberty occurs in response to glutamate administration in several mammals. The aim of this study was to evaluate the effect of exogenous glutamate supply upon the onset of puberty and possible links to changes in serum insulin levels in prepuberal goats. . The study was carried out in northern Mexico at the Southern Goat Research Unit, URUZA-UACH (26° NL, 103° WL, 1,117 m altitude, from June to September. Three-month-old 7/8 Saanen-1/8 Criollo goats (n=18 were fed a diet formulated to met 120% of their nutritional requirements, adjusted for live weight (LW. Both LW and body condition score (BCS were registered every 15 days prior to feeding. In June, goats were randomly allocated to two experimental groups: 1. Excitatory amino acids (AA, n=10; 16.52±1.04 kg, 3.4±0.12 BCS and 2. Control, (CC, n=8; 16.1±1.04 kg, 3.1±0.12 BCS. The AA group received an intravenous infusion of 7 mg kg-1 LW of L-glutamate, while the C group received saline. From mid-June to late September, blood samples were obtained from all goats once a week, to asses P4, by RIA. Goats with serum P4 levels ≥ 1 ng mL-1 in two consecutive blood samples were considered reproductively active,(onset of puberty. Comparisons between groups for both LW and BCS were made using ANOVA-CRD. Percentage of goats depicting or not ovarian activity was tested with a Xi2 analysis. The initial averages for LW and BCS were 16.65±1.04 kg, and 3.31±0.12 units, with no differences (P>0.05 between treatments. Goats in the AA group showed earlier (P

  19. Puberty

    Science.gov (United States)

    ... or a period) usually happens last. In boys: Puberty usually begins with the testicles and penis getting bigger. Then hair grows in the pubic area and armpits. Muscles grow, the voice deepens, and facial hair develops as puberty continues. Both boys and girls may get acne. ...

  20. Paraneoplastic precocious puberty and excessively rapid somatic growth associated with pediatric malignant hepatic tumor: 1 report of 2 cases

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Ok Hwa; Bahk, Yong Whee [Cathalic University College of Medicine, Seoul (Korea, Republic of)

    1990-04-15

    Sexual precocity in a 28-months-old boy and markedly accelerated skeletal growth with large body in a 5 years and 5 months-old-girl are reported. The former resulted from human chorionic gonadotropin-producing hepatoblastoma and the latter from cerebral gigantism associated with hepatoma. These two different disorders are discussed on the common basis of rare association of malignant hepatic tumors with precocious sexual and / or somatic growth. The clinical manifestations, chemical abnormalities, and the radiologic findings are presented with a brief review of the literature.

  1. Paraneoplastic precocious puberty and excessively rapid somatic growth associated with pediatric malignant hepatic tumor: 1 report of 2 cases

    International Nuclear Information System (INIS)

    Kim, Ok Hwa; Bahk, Yong Whee

    1990-01-01

    Sexual precocity in a 28-months-old boy and markedly accelerated skeletal growth with large body in a 5 years and 5 months-old-girl are reported. The former resulted from human chorionic gonadotropin-producing hepatoblastoma and the latter from cerebral gigantism associated with hepatoma. These two different disorders are discussed on the common basis of rare association of malignant hepatic tumors with precocious sexual and / or somatic growth. The clinical manifestations, chemical abnormalities, and the radiologic findings are presented with a brief review of the literature

  2. Metabolic control of puberty: roles of leptin and kisspeptins.

    Science.gov (United States)

    Sanchez-Garrido, Miguel A; Tena-Sempere, Manuel

    2013-07-01

    This article is part of a Special Issue "Puberty and Adolescence". Reproduction is an energy-demanding function. Accordingly, puberty is metabolically gated, as a means to prevent fertility in conditions of energy insufficiency. In addition, obesity has been shown to impact the timing of puberty and may be among the causes for the earlier trends of pubertal age reported in various countries. The metabolic control of puberty in such a spectrum of situations, ranging from energy deficit to extreme overweight, is the result of the concerted action of different peripheral hormones and central transmitters that sense the metabolic state of the organism and transmit this information to the various elements of the reproductive axis, mainly the GnRH neurons. Among the peripheral signals involved, the adipose hormone, leptin, is known to play an essential role in the regulation of puberty, especially in females. Yet, although it is clear that the effects of leptin on puberty onset are predominantly permissive and mainly conducted at central (hypothalamic) levels, the primary sites and mechanisms of action of leptin within the reproductive brain remain unsolved. In this context, neurons expressing kisspeptins, the products of the Kiss1 gene that have emerged recently as essential upstream regulators of GnRH neurons, operate as key sensors of the metabolic state and funnel of the reproductive effects of leptin. Yet, much debate has arisen recently on whether the putative actions of leptin on the Kiss1 system are actually indirect and/or may primarily target Kiss1-independent pathways, such as those originating from the ventral premmamilary nucleus. Moreover, evidence has been presented for extra-hypothalamic or peripheral actions of leptin, including direct gonadal effects, which may contribute to the metabolic control of reproduction in extreme body weight conditions. In this work, we will critically review the experimental evidence supporting a role of leptin, kisspeptin

  3. Delayed Puberty (For Teens)

    Science.gov (United States)

    ... Safe Videos for Educators Search English Español Delayed Puberty KidsHealth / For Teens / Delayed Puberty What's in this ... wonder if there's anything wrong. What Is Delayed Puberty? Puberty is the time when your body grows ...

  4. Behavioral aggressiveness in boys with sexual precocity

    Directory of Open Access Journals (Sweden)

    Bindu Kulshreshtha

    2012-01-01

    Full Text Available Background: Some boys with sexual precocity are known to have behavioral problems like increased physical and verbal aggression and school and social maladjustments. It is believed to be due to premature androgen exposure. However, it is not clear why only some develop this problem, difference in etiology could be one explanation. Aim: The aim of the study is to assess behavioral aggression in boys with sexual precocity due to different disorders. Materials and Methods: Seven children, ages three to seven years, were enrolled for this study. Two were diagnosed to have congenital adrenal hyperplasia (CAH, three had testotoxicosis, while two had central precocious puberty. Parents of children with precocious puberty underwent the (CASP questionnaire (children′s aggression scale-parent version. Results: Testosterone levels were high in all patients. Parents denied any history of physical or verbal aggression in the two boys with CAH. Their CASP rating was 0. In contrast, the CASP ratings in the two boys with testotoxicosis and the two with precocious puberty for five domains ranged from 3.1 - 24.2, 2.6 - 8.3,1-5.6,0 - 7.1, and 0 - 1, respectively. In the present study, increased aggression was seen among all the patients with testotoxicosis and both with precocious puberty. In contrast, there were no symptoms of either increased verbal or physical aggression in either of the two patients with CAH. Conclusions: The hormonal milieu in the boys with CAH versus those with sexual precocity due to other causes differed in terms of cortisol and androgen precursors. The androgen excess in CAH children was a consequence of cortisol deficiency. It is possible that cortisol sufficiency is required for androgen-mediated behavioral effects.

  5. Insulin Resistance of Puberty.

    Science.gov (United States)

    Kelsey, Megan M; Zeitler, Philip S

    2016-07-01

    Puberty is a time of considerable metabolic and hormonal change. Notably, puberty is associated with a marked decrease in insulin sensitivity, on par with that seen during pregnancy. In otherwise healthy youth, there is a nadir in insulin sensitivity in mid-puberty, and then it recovers at puberty completion. However, there is evidence that insulin resistance (IR) does not resolve in youth who are obese going into puberty and may result in increased cardiometabolic risk. Little is known about the underlying pathophysiology of IR in puberty, and how it might contribute to increased disease risk (e.g., type 2 diabetes). In this review, we have outlined what is known about the IR in puberty in terms of pattern, potential underlying mechanisms and other mediating factors. We also outline other potentially related metabolic changes that occur during puberty, and effects of underlying insulin resistant states (e.g., obesity) on pubertal changes in insulin sensitivity.

  6. Annual Research Progress Report for Department of Clinical Investigation (Madigan Army Medical Center), October 1990 - September 1991

    Science.gov (United States)

    1991-09-01

    Protocol for a Multicenter Study for thýe Treatment 47 190,091 of Central Precocious Puberty with D-Trp(6)-Des-Gly(10)-N- ethylamide-LHRH, A Long-Acting...Analog of Luteinizing Herr-,"ne Releasing.... Moore DC 0 Characterization of LiI Isoform.i in Treatl and Untreated 48 n91� Precocioas Puberty Moore DC...Epidermoid Carcinoma of the Penis , Phase II 33 Index To Protocols (cont’d) PI and No. &AM Davidson H C SWOG 8573: Treatment of Limited Small Cell Lung

  7. Defining a novel leptin–melanocortin–kisspeptin pathway involved in the metabolic control of puberty

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    Maria Manfredi-Lozano

    2016-10-01

    Full Text Available Objective: Puberty is a key developmental phenomenon highly sensitive to metabolic modulation. Worrying trends of changes in the timing of puberty have been reported in humans. These might be linked to the escalating prevalence of childhood obesity and could have deleterious impacts on later (cardio-metabolic health, but their underlying mechanisms remain unsolved. The neuropeptide α-MSH, made by POMC neurons, plays a key role in energy homeostasis by mediating the actions of leptin and likely participates in the control of reproduction. However, its role in the metabolic regulation of puberty and interplay with kisspeptin, an essential puberty-regulating neuropeptide encoded by Kiss1, remain largely unknown. We aim here to unveil the potential contribution of central α-MSH signaling in the metabolic control of puberty by addressing its role in mediating the pubertal effects of leptin and its potential interaction with kisspeptin. Methods: Using wild type and genetically modified rodent models, we implemented pharmacological studies, expression analyses, electrophysiological recordings, and virogenetic approaches involving DREADD technology to selectively inhibit Kiss1 neurons, in order to interrogate the physiological role of a putative leptin→α-MSH→kisspeptin pathway in the metabolic control of puberty. Results: Stimulation of central α-MSH signaling robustly activated the reproductive axis in pubertal rats, whereas chronic inhibition of melanocortin receptors MC3/4R, delayed puberty, and prevented the permissive effect of leptin on puberty onset. Central blockade of MC3/4R or genetic elimination of kisspeptin receptors from POMC neurons did not affect kisspeptin effects. Conversely, congenital ablation of kisspeptin receptors or inducible, DREADD-mediated inhibition of arcuate nucleus (ARC Kiss1 neurons resulted in markedly attenuated gonadotropic responses to MC3/4R activation. Furthermore, close appositions were observed between

  8. Mutational Analysis of TAC3 and TACR3 Genes in Patients with Idiopathic Central Pubertal Disorders

    Science.gov (United States)

    Tusset, Cintia; Noel, Sekoni D.; Trarbach, Ericka B.; Silveira, Letícia F. G.; Jorge, Alexander A. L.; Brito, Vinicius N.; Cukier, Priscila; Seminara, Stephanie B.; de Mendonça, Berenice B.; Kaiser, Ursula B.; Latronico, Ana Claudia

    2013-01-01

    Aim To investigate the presence of variants in the TAC3 and TACR3 genes, which encode NKB and its receptor (NK3R), respectively, in a large cohort of patients with idiopathic central pubertal disorders. Patients and Methods Two hundred and thirty seven patients were studied: 114 with central precocious puberty (CPP), 73 with normosmic isolated hypogonadotropic hypogonadism (IHH) and 50 with constitutional delay of growth and puberty (CDGP). The control group consisted of 150 Brazilian individuals with normal pubertal development. Genomic DNA was extracted from peripheral blood and the entire coding region of both TAC3 and TACR3 genes were amplified and automatically sequenced. Results We identified one variant (p.A63P) in NKB and four variants, p.G18D, p.L58L (c.172C>T), p.W275* and p.A449S in NK3R, which were absent in the control group. The p.A63P variant was identified in a girl with CPP, and p.A449S in a girl with CDGP. The known p.G18D, p.L58L and p.W275* variants were identified in three unrelated males with normosmic IHH. Conclusion Rare variants in the TAC3 and TACR3 genes were identified in patients with central pubertal disorders. Loss-of-function variants of TACR3 were associated with the normosmic IHH phenotype. PMID:23329188

  9. What Are Normal Puberty, Precocious Puberty, and Delayed Puberty?

    Science.gov (United States)

    ... Videos Get to Know NICHD Podcasts and Audio Social Media Join NICHD Listservs About NICHD Organization Office of ... many children do not experience major psychological or social problems, ... body's timing for sexual maturity is later than the normal range of ages. ...

  10. Delayed Puberty

    DEFF Research Database (Denmark)

    Kolby, Nanna; Busch, Alexander Siegfried; Juul, Anders

    2017-01-01

    . The underlying reasons for the large variation in the age at pubertal onset are not fully established; however, nutritional status and socioeconomic and environmental factors are known to be influencing, and a significant amount of influencing genetic factors have also been identified. The challenges...... optimal in discriminating especially CDGP from HH. Management of the delayed puberty depends on the etiology. For boys with CDGP an observational period will often reveal imminent puberty. If puberty is not progressing spontaneously, sex steroid replacement is effective in stimulating the development...

  11. Environmental factors and puberty timing: expert panel research needs

    DEFF Research Database (Denmark)

    Louis, G.M. Buck; Jr, L.E. Gray; Marcus, M.

    2008-01-01

    Serono Symposia International convened an expert panel to review the impact of environmental influences on the regulation of pubertal onset and progression while identifying critical data gaps and future research priorities. An expert panel reviewed the literature on endocrine-disrupting chemicals......, body size, and puberty. The panel concluded that available experimental animal and human data support a possible role of endocrine-disrupting chemicals and body size in relation to alterations in pubertal onset and progression in boys and girls. Critical data gaps prioritized for future research......, and (3) basic research to identify the primary signal(s) for the onset of gonadotropin-releasing hormone-dependent/central puberty and gonadotropin-releasing hormone-independent/peripheral puberty. Prospective studies of couples who are planning pregnancies or pregnant women are needed to capture...

  12. Delayed puberty in boys

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/007695.htm Delayed puberty in boys To use the sharing features on this page, please enable JavaScript. Delayed puberty in boys is when puberty does not begin ...

  13. Delayed puberty in girls

    Science.gov (United States)

    ... sexual development - girls; Pubertal delay - girls; Constitutional delayed puberty ... In most cases of delayed puberty, growth changes just begin later than usual, sometimes called a late bloomer. Once puberty begins, it progresses normally. This pattern runs ...

  14. Blood Test: Testosterone

    Science.gov (United States)

    ... Test: Estradiol Precocious Puberty Understanding Puberty Endocrine System Male Reproductive System Getting a Blood Test (Video) All About Puberty Blood Test (Video) Male Reproductive System View more About Us Contact Us Partners Editorial ...

  15. Timing and Stages of Puberty

    Science.gov (United States)

    ... and stages of puberty Timing and stages of puberty Adolescence and puberty can be so confusing! Here’s some info on what to expect and when: Puberty in girls usually starts between the ages of ...

  16. Understanding Puberty (For Parents)

    Science.gov (United States)

    ... Safe Videos for Educators Search English Español Understanding Puberty KidsHealth / For Parents / Understanding Puberty What's in this ... your child through all the changes? Stages of Puberty Sure, most of us know the telltale signs ...

  17. EFFECT OF EXOGENOUS GLUTAMATE SUPPLY ON THE ONSET OF PUBERTY IN GOATS. II. SERUM LEVELS OF TRIIODOTHYRONINE

    Directory of Open Access Journals (Sweden)

    Jose Ignacio Lopez-Medrano

    2009-02-01

    Full Text Available Thyroid hormones and their receptors in the ovaries are active regulators of reproductive function; both hyper- and hypo-thyroidism may result in estrous cycle disturbances. In addition, thyroid hormones elicit an extraordinary multiplicity of biochemical, cellular, and physiological responses, both in the simplest and the most complex organisms. On the other hand, glutamate, the main excitatory amino acid of the central nervous system has a marked stimulatory effect on the reproductive axis in mammals. In fact, occurrence of precocious puberty in response to administration of glutamate agonists has been reported in several species. The aim of the present study was to evaluate the effect of administration of glutamate on the onset of puberty in goats, and the association with serum triiodothyronine levels (T3, as a possible metabolic signal for the onset of ovarian activity in juvenile goats. The study was carried out in northern Mexico (26Ëš N from June to October. Goats (n=18 were offered alfalfa hay (14% PC; 1.14 Mkal Kg-1 ENm, corn silage (8.1% PC, 1.62 ENm Mcal kg-1, and ground corn grain (11.2% PC, 2.38 ENm Mcal kg-1 under natural photoperiod. Location, animals, treatment design, preparation of the glutamate buffer solution, blood sampling scheme and quantification of serum P4 were described in the first part of this study. Serum samples were also evaluated for their content of T3 by RIA. Final averages for live weight (LW and body condition score (BCS did not differ (P>0.05 between the Glutamate-supplemented and control groups (23.7±0.72 vs. 22.7±0.72 kg and (3.69±0.10 vs. 3.38±0.10 units, respectively. The overall average for T3 during the study was 1.47 ng mL-1, with higher levels (P

  18. All about Puberty (For Kids)

    Science.gov (United States)

    ... Videos for Educators Search English Español All About Puberty KidsHealth / For Kids / All About Puberty What's in ... you get older. Putting the P.U. in Puberty P.U.! A lot of kids notice that ...

  19. Precocious Puberty or Premature Thelarche: Analysis of a Large Patient Series in a Single Tertiary Center with Special Emphasis on 6- to 8-Year-Old Girls

    Directory of Open Access Journals (Sweden)

    Tero Varimo

    2017-08-01

    Full Text Available IntroductionWe describe the etiology, MRI findings, and growth patterns in girls who had presented with signs of precocious puberty (PP, i.e., premature breast development or early menarche. Special attention was paid to the diagnostic findings in 6- to 8-year-olds.Materials and methodsWe reviewed the medical records of 149 girls (aged 0.7–10.3 years who had been evaluated for PP in the Helsinki University Hospital between 2001 and 2014.ResultsIn 6- to 8-year-old girls, PP was most frequently caused by idiopathic gonadotropin-releasing hormone (GnRH-dependent PP (60% and premature thelarche (PT; 39%. The former subgroup grew faster (8.7 ± 2.0 cm/year, n = 58 than the girls with PT (7.0 ± 1.1 cm/year, n = 32 (P < 0.001, and the best discrimination for GnRH-dependent PP was achieved with a growth velocity cut-off value of 7.0 cm/year (sensitivity 92% and specificity 58% [area under the curve 0.82, 95% confidence interval (CI 0.73–0.91, P < 0.001]. Among asymptomatic and previously healthy 6- to 8-year-old girls with GnRH-dependent PP, one (1.7%, 95% CI 0.3–9.7% had a pathological brain MRI finding requiring surgical intervention (craniopharyngioma. In girls younger than 3 years, the most frequent cause of breast development was PT, and, in 3- to 6-year-olds, GnRH-dependent PP.ConclusionIn 6- to 8-year-old girls, analysis of growth velocity is helpful in differentiating between PT and GnRH-dependent PP. Although the frequency of clinically relevant intracranial findings in previously healthy, asymptomatic 6- to 8-year-old girls was low, they can present without any signs or symptoms, which favors routine MRI imaging also in this age group.

  20. Puberty menorrhagia Requiring Inpatient Admission

    Directory of Open Access Journals (Sweden)

    AH Khosla

    2010-06-01

    Full Text Available INTRODUCTION: Puberty menorrhagia is a significant health problem in adolescent age group and severe cases may require admission and blood transfusion. Aim of this study was to evaluate the causes, associated complications and management of puberty menorrhagia. METHODS: Hospital records of all patients of puberty menorrhagia requiring admission were analyzed for etiology, duration since menarche, duration of bleeding, investigation profile and management. RESULTS: There were 18 patients of puberty menorrhagia requiring hospital admission. Etiology was anovulatory bleeding in 11 patients, bleeding disorders in five which included idiopathic thrombocytopenia purpura in three and one each with Von-Willebrand disease and leukemia. Two patients had hypothyroidism as the cause. Fourteen patients presented with severe anaemia and required blood transfusion. All except one responded to oral hormonal therapy. CONCLUSIONS: Puberty menorrhagia can be associated with severe complications and requiring blood transfusion. Although most common cause is anovulation but bleeding disorder, other medical condition and other organic causes must be ruled out in any patient of Puberty menorrhagia. KEYWORDS: anovulation, bleeding disorder, puberty, menorrhagia, anaemia.

  1. Boys and Puberty (For Kids)

    Science.gov (United States)

    ... Videos for Educators Search English Español Boys and Puberty KidsHealth / For Kids / Boys and Puberty What's in this article? Why Are Girls Taller ... as you grow up, especially as you reach puberty (say: PYOO-bur-tee), the name for the ...

  2. Puberty and adolescent sexuality.

    Science.gov (United States)

    Fortenberry, J Dennis

    2013-07-01

    This article is part of a Special Issue "Puberty and Adolescence". Sexuality emerges as a major developmental element of puberty and the adolescent years that follow. However, connecting the sexuality that emerges with puberty and elements of adult sexuality is difficult because much adolescent sexuality research addresses the transition to partnered sexual behaviors (primarily coitus) and consequences such as unplanned pregnancy and sexually transmitted infections. This review proposes a framework of an expanded understanding of puberty and adolescent sexuality from the perspective of four hallmarks of adult sexuality: sexual desire; sexual arousal; sexual behaviors; and, sexual function. This approach thus addresses important gaps in understanding of the ontogeny of sex and the continuum of sexuality development from adolescence through the adult lifespan. Copyright © 2013 Elsevier Inc. All rights reserved.

  3. Trithorax dependent changes in chromatin landscape at enhancer and promoter regions drive female puberty.

    Science.gov (United States)

    Toro, Carlos A; Wright, Hollis; Aylwin, Carlos F; Ojeda, Sergio R; Lomniczi, Alejandro

    2018-01-04

    Polycomb group (PcG) proteins control the timing of puberty by repressing the Kiss1 gene in hypothalamic arcuate nucleus (ARC) neurons. Here we identify two members of the Trithorax group (TrxG) of modifiers, mixed-lineage leukemia 1 (MLL1), and 3 (MLL3), as central components of an activating epigenetic machinery that dynamically counteracts PcG repression. Preceding puberty, MLL1 changes the chromatin configuration at the promoters of Kiss1 and Tac3, two genes required for puberty to occur, from repressive to permissive. Concomitantly, MLL3 institutes a chromatin structure that changes the functional status of a Kiss1 enhancer from poised to active. RNAi-mediated, ARC-specific Mll1 knockdown reduced Kiss1 and Tac3 expression, whereas CRISPR-Cas9-directed epigenome silencing of the Kiss1 enhancer selectively reduced Kiss1 activity. Both interventions delay puberty and disrupt reproductive cyclicity. Our results demonstrate that an epigenetic switch from transcriptional repression to activation is crucial to the regulatory mechanism controlling the timing of mammalian puberty.

  4. Fibrous Dysplasia

    Science.gov (United States)

    ... endocrine problems such as early puberty (precocious puberty), hyperthyroidism (excess thyroid hormone), excess growth hormone (gigantism or ... awareness and enhance knowledge and understanding of the prevention, early detection, and treatment of these diseases as ...

  5. In Utero and Lactational Effects of Aqueous Foeniculum Vulgare (Fennel Seed Extract on Puberty Timing, Estrus Cycle and Sexual Behavior in Mice

    Directory of Open Access Journals (Sweden)

    Rahmatollah Parandin

    2018-02-01

    Full Text Available Abstract Background: Several studies have shown that developmental exposure to phytoestrogens causes adverse effects on the reproductive functions. Fennel as a phytoestrogen plant has a rich history in household use and traditional medicine.So, the current study was designed to investigate the effects of in utero and neonatal exposure with fennel on the puberty onset, estrus cycle, reproductive organs and sexual behavior of their offspring. Materials and Methods: BALB/c mice were injected intraperitoneally with 0 (control, 100, 200 and 400 (mg/kg bw aqueous fennel seed extract (AFSE, daily from day 7 of gestation to postnatal day (PND 7. Results: Vaginal opening (sign of puberty onset was advanced in 200 (p<0.01 and 400 AFSE (p<0.001 treated females. A 30 days vaginal smear check indicated that 200 or 400 AFSE treated mice showed a prolonged estrus with decreased proestrus, estrus and metestrus stages and increased and diestrus stage and index. The ovary weight, number of corpora lutea and LH concentration decreased and uterus weight and estradiol concentration increased in the 200 or 400 treated mice in PND 70. 400 AFSE (p<0.01 treated females showed lordosis with a low lordosis quotient (LQ when compared to the control group. Conclusion: These results suggest that developmental exposure to AFSE, due to its estrogenic compounds, it may cause the precocious puberty, disrupted estrus cycle, altered weight of reproductive organs, hormonal imbalance and low lordosis behavior.

  6. Serum concentrations of free and total insulin-like growth factor-I, IGF binding proteins -1 and -3 and IGFBP-3 protease activity in boys with normal or precocious puberty

    DEFF Research Database (Denmark)

    Juul, A; Flyvbjerg, Allan; Frystyk, Jan

    1996-01-01

    Circulating IGF-I and IGF binding protein-3 (IGFBP-3) levels both increase in puberty where growth velocity is high. The amount of free IGF-I is dependent on the IGF-I level and on the concentrations of the specific IGFBPs. Furthermore, IGFBP-3 proteolysis regulates the bioavailability of IGF......-I. However, the concentration of free IGF-I and possible IGFBP-3 proteolytic activity in puberty has not previously been studied....

  7. Association of Van Wyk Grumbach and Debre Semelaigne Syndromes with Severe Hypothyroidism.

    Science.gov (United States)

    Oden Akman, Alkim; Tayfun, Meltem; Demirel, Fatma; Ucakturk, Seyit Ahmed; Gungor, Ali

    2015-12-01

    Van Wyk Grumbach syndrome (VWGS) and Kocher-Debre Semelaigne syndrome (KDSS) are rare forms of pseudo-precocious puberty and myopathy in patients with longstanding untreated hypothyroidism. We present the case of an adolescent girl who developed pseudo-precocious puberty and myopathy caused by long-term untreated hypothyroidism. A 17-year-old female patient was referred to our outpatient clinic due to menstrual irregularities. She had muscle pain and multiple cystic ovaries in addition to clinical signs of severe congenital hypothyroidism. High levels of creatinine and creatinine kinase and accompanying muscle hypertrophy were present. After the initiation of L-thyroxine therapy, the symptoms were alleviated in a short time. Congenital and acquired hypothyroidism should be considered in the differential diagnosis of pseudo-precocious puberty and myopathy that presents with muscle pain, muscle hypertrophy, and elevated creatinine kinase levels. Copyright © 2015 North American Society for Pediatric and Adolescent Gynecology. Published by Elsevier Inc. All rights reserved.

  8. Kisspeptin and Puberty in Mammals

    Science.gov (United States)

    Terasawa, Ei; Guerriero, Kathryn A.; Plant, Tony M.

    2014-01-01

    Since the discovery of the G-protein coupled receptor (kisspeptin receptor) and its ligand, kisspeptin, our understanding of the neurobiological mechanisms that govern the pituitary-gonadal axis has evolved dramatically. In this chapter, we have reviewed progress regarding the relationship between kisspeptin and puberty, and have proposed a novel hypothesis for the role of kisspeptin signaling in the onset of this crucial developmental event. According to this hypothesis, although kisspeptin neurons in the arcuate nucleus (ARC) are critical for puberty, this is simply because these cells are an integral component of the hypothalamic GnRH pulse generating mechanism that drives intermittent release of the decapeptide, as an increase in GnRH is obligatory for the onset of puberty. In our model, ARC kisspeptin neurons play no “regulatory” role in controlling the timing of puberty. Rather, as a component of the neural network responsible for GnRH pulse generation, they subserve upstream regulatory mechanisms that are responsible for the timing of puberty. PMID:23550010

  9. Papular, profuse, and precocious keratosis pilaris.

    Science.gov (United States)

    Castela, Emeline; Chiaverini, Christine; Boralevi, Franck; Hugues, Rosalind; Lacour, Jean Philippe

    2012-01-01

    Keratosis pilaris (KP) is a frequent and benign condition in children characterized by the presence of rough, follicular papules and varying degrees of erythema. Different variants have been described, including simple KP and red KP. Between September 2007 and October 2010, 11 children with profuse and precocious KP seen at the department of pediatric dermatology were included. They defined an underemphasized clinical variant of childhood KP: the papular, profuse, and precocious KP characterized by early age of onset (<18 mos), extensive involvement of the limbs and cheeks, and papular nature of lesions. No clinical association has been found. The main complication was episodes of folliculitis. Diagnosis was delayed for all patients. Treatment is difficult, but association between emollient and keratolytic agents can provide some help. © 2011 Wiley Periodicals, Inc.

  10. Relationships between urinary biomarkers of phytoestrogens, phthalates, phenols, and pubertal stages in girls

    Directory of Open Access Journals (Sweden)

    Chakraborty TR

    2012-01-01

    Full Text Available Tandra R Chakraborty1, Eilliut Alicea1, Sanjoy Chakraborty21Department of Biology, Adelphi University, One South Avenue, Garden City; 2Department of Biological Sciences, New York City College of Technology, New York, NY, USAAbstract: Phytoestrogens, phthalates, and phenols are estrogen-disrupting chemicals that have a pronounced effect at puberty. They are exogenous chemicals that are either plant-derived or man-made, and can alter the functions of the endocrine system and cause various health defects by interfering with the synthesis, metabolism, binding, or cellular responses of natural estrogens. Phytoestrogens, phthalates, and phenols are some of the potent estrogens detectable in urine. Phytoestrogens are plant-derived xenestrogens found in a wide variety of food products, like soy-based food, beverages, several fruits, and vegetables. Exposure to phytoestrogens can delay breast development and further lead to precocious puberty. The effect of phytoestrogens is mediated through estrogen receptors α and β or by binding with early immediate genes, such as jun and fos. Phthalates are multifunctional synthetic chemicals used in plastics, polyvinyl chloride products, cosmetics, hair spray, and children's toys. Phthalates have been shown to cause defeminization, thelarche, precocious puberty, and an increase in breast and pubic hair in pubertal girls. However, reports are also available that show no association of phthalates with precocious puberty in girls. Phthalates can act through a receptor-mediated signaling pathway or affect the production of luteinizing hormone and follicle-stimulating hormone that has a direct effect on estrogen formation. Phenols like bisphenol A are industrial chemicals used mainly in the manufacture of polycarbonates and plastic materials. Bisphenol A has been shown to cause precocious puberty and earlier menarche in pubertal girls. Reports suggest that the neurotoxic effect of bisphenol A can be mediated either by

  11. Concerns Boys Have about Puberty

    Science.gov (United States)

    ... Size Email Print Share Concerns Boys Have About Puberty Page Content Article Body Boys have pubertal concerns ... just part of growing up. Involuntary Erections During puberty, boys get erections spontaneously, without touching their penis ...

  12. Puberty as an accelerator for diabetes complications.

    Science.gov (United States)

    Cho, Yoon Hi; Craig, Maria E; Donaghue, Kim C

    2014-02-01

    Much is written about how difficult it is to deal with diabetes during adolescence, and rightly so. Less is understood as to how puberty may be an accelerator of vascular complications. With the increase in childhood diabetes, complication risks need to be revisited in relation to puberty and the secular increase in adiposity. Recent data suggest greater risk for severe vascular complications in those with diabetes during puberty, compared with young people who develop diabetes after puberty. It is also widely recognized that higher hemoglobin A1c (HbA1c) results are often seen during the pubertal period. This article will review complication outcomes in relation to puberty and examine mechanisms by which puberty may modify risk above glycemic exposure, and possible gender disparities in the risk of complications in the adolescent period. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  13. Puberty and Its Measurement: A Decade in Review

    Science.gov (United States)

    Dorn, Lorah D.; Biro, Frank M.

    2011-01-01

    Since the early 1980s, the focus on the importance of puberty to adolescent development has continued with variability in the methodology selected to measure puberty. To capture the relevant and important issues regarding the measurement of puberty in the last decade, this paper will address (1) the neuroendocrine aspects of puberty and its…

  14. Endocrine evaluation of reproductive function in girls during infancy, childhood and adolescence

    DEFF Research Database (Denmark)

    Juul, Anders; Hagen, Casper P; Aksglaede, Lise

    2012-01-01

    a spectrum of disorders such as premature thelarche, premature adrenarche, central and peripheral precocious puberty, adolescent polycystic ovarian syndrome, functional ovarian hyperandrogenism, late-onset congenital adrenal hyperplasia, primary and secondary amenorrhea, and premature ovarian insufficiency...... detailed knowledge on the normal maturational changes in the hypothalamic-pituitary-ovarian and hypothalamic-pituitary-adrenal axes. Changes in basal reproductive hormone levels in infancy, childhood and adolescence as well as the GnRH and ACTH test procedures in girls and adolescents are described...

  15. Evaluation of 451 Danish Boys With Delayed Puberty

    DEFF Research Database (Denmark)

    Lawaetz, Jacob Gerner; P. Hagen, Casper; Mieritz, Mikkel Grunnet

    2015-01-01

    Context: Few data exist on the diagnostic criteria, and on the effects of puberty induction, in boyswith constitutional delay in growth and puberty (CDGP). Objective: To develop puberty nomograms based on Danish boys with normal pubertal development.To evaluate the different diagnostic criteria...... and the effect of oral testosterone undecanoate(TU) in boys with CDGP. Design: A cross-sectional and longitudinal study of Danish boys with normal pubertal development(COPENHAGEN puberty study). A retrospective observational study of 451 boys evaluated fordelayed puberty between 1990 and 2013. Setting: Tertiary...... by the puberty nomogram(genital stage 2 SD for age) versus the classical criteria (genital stage 1 at 14 years). The effectof one year of oral TU treatment on pubertal progression, circulating hormones, height, andpredicted adult height (PAH). Results: Seventy-eight (27%) of the 287 boys had delayed pubertal...

  16. Combination growth hormone and gonadotropin releasing hormone analog therapy in 11beta-hydroxylase deficiency.

    Science.gov (United States)

    Bajpai, Anurag; Kabra, Madhulika; Menon, P S N

    2006-06-01

    Diagnosis of 11beta-hydroxylase deficiency was made in a boy at the age of 2 1/2 years on the basis of peripheral precocious puberty, growth acceleration (height standard deviation score +4.4) with advanced skeletal maturation (bone age 8.4 years) and elevated deoxycortisol levels. Glucocorticoid supplementation led to normalization of blood pressure but was associated with progression to central precocious puberty and increase in bone age resulting in decrease in predicted adult height to 133.7 cm (target height 163 cm). The child was started on GnRH analog (triptorelin 3.75 mg every 28 days), which led to improvement in predicted adult height by 3.1 cm over 15 months. Addition of growth hormone (0.1 IU/kg/day) resulted in improvement in predicted adult height (151 cm) and height deficit (12 cm) over the next 3.6 years. Final height (151 cm) exceeded predicted height at the initiation of GnRH analog treatment by 17.3 cm. This report suggests that combination GH and GnRH analog treatment may be useful in improving height outcome in children with 11beta-hydroxylase deficiency and compromised final height.

  17. Integrative testis transcriptome analysis reveals differentially expressed miRNAs and their mRNA targets during early puberty in Atlantic salmon.

    Science.gov (United States)

    Skaftnesmo, K O; Edvardsen, R B; Furmanek, T; Crespo, D; Andersson, E; Kleppe, L; Taranger, G L; Bogerd, J; Schulz, R W; Wargelius, A

    2017-10-18

    Our understanding of the molecular mechanisms implementing pubertal maturation of the testis in vertebrates is incomplete. This topic is relevant in Atlantic salmon aquaculture, since precocious male puberty negatively impacts animal welfare and growth. We hypothesize that certain miRNAs modulate mRNAs relevant for the initiation of puberty. To explore which miRNAs regulate mRNAs during initiation of puberty in salmon, we performed an integrated transcriptome analysis (miRNA and mRNA-seq) of salmon testis at three stages of development: an immature, long-term quiescent stage, a prepubertal stage just before, and a pubertal stage just after the onset of single cell proliferation activity in the testis. Differentially expressed miRNAs clustered into 5 distinct expression profiles related to the immature, prepubertal and pubertal salmon testis. Potential mRNA targets of these miRNAs were predicted with miRmap and filtered for mRNAs displaying negatively correlated expression patterns. In summary, this analysis revealed miRNAs previously known to be regulated in immature vertebrate testis (miR-101, miR-137, miR-92b, miR-18a, miR-20a), but also miRNAs first reported here as regulated in the testis (miR-new289, miR-30c, miR-724, miR-26b, miR-new271, miR-217, miR-216a, miR-135a, miR-new194 and the novel predicted n268). By KEGG enrichment analysis, progesterone signaling and cell cycle pathway genes were found regulated by these differentially expressed miRNAs. During the transition into puberty we found differential expression of miRNAs previously associated (let7a/b/c), or newly associated (miR-15c, miR-2184, miR-145 and the novel predicted n7a and b) with this stage. KEGG enrichment analysis revealed that mRNAs of the Wnt, Hedgehog and Apelin signaling pathways were potential regulated targets during the transition into puberty. Likewise, several regulated miRNAs in the pubertal stage had earlier been associated (miR-20a, miR-25, miR-181a, miR-202, let7c/d/a, miR-125b

  18. Do internationally adopted children in the Netherlands use more medication than their non-adopted peers?

    Science.gov (United States)

    van Ginkel, Joost R; Juffer, Femmie; Bakermans-Kranenburg, Marian J; van IJzendoorn, Marinus H

    2016-05-01

    Empirical evidence has shown that international adoptees present physical growth delays, precocious puberty, behavioral problems, and mental health referrals more often than non-adoptees. We hypothesized that the higher prevalence of (mental) health problems in adoptees is accompanied by elevated consumption of prescription drugs, including antidepressants, attention deficit hyperactivity disorder (ADHD) medication, and medication for growth inhibition/stimulation. In an archival, population-based Dutch cohort study, data on medication use were available from the Health Care Insurance Board by Statistics Netherlands from 2006 to 2011. The Dutch population born between 1994 and 2005 and alive during the period of measurement was included (2,360,450 including 10,602 international adoptees, of which 4447 from China). Their mean age was 6.5 years at start (range 1-12 years) and 11.5 years at the end of the measurement period (range 6-17 years). Chinese female adoptees used less medication for precocious puberty (as treatment for precocious puberty; odds ratio (OR) = 0.57, effect size Cohen's d = -0.31) and contraception (OR = 0.65, d = -0.24) than non-adoptees. For both males and females, non-Chinese adoptees used more medication for ADHD than non-adoptees (males: OR = 1.22, females: OR = 1.32), but the effect was small (males: d = 0.11, females: d = 0.15). Adoptees in the Netherlands generally do not use more medication than their non-adopted peers. • Meta-analytical evidence shows that international adoptees present physical growth delays and mental health referrals more often than non-adopted controls. • With the exception of one Swedish study on ADHD medication, there is no other systematic research on medication use of international adoptees. What is New: • All differences in medication use between international adoptees in the Netherlands and non-adopted controls were below the threshold of a small effect with the exception

  19. Hypothalamo-pituitary function after therapy for cancer

    International Nuclear Information System (INIS)

    Brauner, R.

    1995-01-01

    Cranial irradiation may result in altered hypothalamo-pituitary function in patients treated for cancer distant from this area. Growth hormone (GH) deficiency is the most frequent complication. The frequency, delay of occurrence and severity of GH deficiency depend on the irradiation dose delivered to this area. The other factors influencing the frequency are the age at irradiations and the fractionation schedule. The frequency of other hypothalamo-pituitary changes is also dose-dependent: thyrotropin and gonadotropin deficiencies occur in 50-60% of cases after 50 Gray, and corticotrophin deficiency in 30%. Low dose cranial irradiations may also induce precocious puberty (onset < 8 yr in girls and < 10 yr in boys). The radiation-induced lesions seem to occur in the hypothalamus rather than in the pituitary. There is generally a good correlation between the GH peak and the growth velocity, but there may be normal growth in spite of GH deficiency after low dose or due to precocious puberty, decreased growth velocity in spite of normal GH peak, due to bone irradiation. Results on final height have been optimized by a better indication of GH therapy and by its association with treatment of precocious puberty. (author). 19 refs

  20. Van Wyk and Grumbach syndrome revisited: imaging and clinical findings in pre- and postpubertal girls

    International Nuclear Information System (INIS)

    Browne, Lorna P.; Guillerman, R.P.; Boswell, Hillary B.; Crotty, Eric J.; O'Hara, Sara M.; Birkemeier, Krista L.

    2008-01-01

    In 1960 Van Wyk and Grumbach described a syndrome of juvenile hypothyroidism, precocious puberty and ovarian enlargement. These findings undergo complete regression with thyroid hormone replacement therapy. This diagnosis can be made on the basis of imaging findings and thyroid function analysis, avoiding surgery. To relate the distinctive clinical and imaging features and putative pathophysiological mechanism of a series of patients with Van Wyk and Grumbach syndrome (VWGS). Patients with VWGS diagnosed at two large children's hospitals over a 6-year period beginning in 1999 were retrospectively reviewed. A literature review was also conducted. Five female patients were diagnosed with cystic ovarian enlargement and hypothyroidism at ages ranging from 9 to 17 years. Isosexual precocious puberty was found in prepubescent patients. Associated findings included delayed bone age, ascites, and pleural and pericardial effusions. Ovarian cyst involution occurred following treatment of the hypothyroidism. The association of primary hypothyroidism with cystic ovarian enlargement and precocious puberty is important to recognize. In the absence of suspected ovarian torsion, surgery is unnecessary, as cyst regression occurs after appropriate thyroid hormone replacement. Noncompliance with hormone replacement therapy should be considered when cystic ovarian enlargement is noted in patients with a history of hypothyroidism. (orig.)

  1. Hypothalamo-pituitary function after therapy for cancer; Retentissement hypothalamo-hypophysaire des traitements des cancers

    Energy Technology Data Exchange (ETDEWEB)

    Brauner, R. [Paris-5 Univ., 75 (France)]|[Hopital Necker-Enfants-Malades, 75 - Paris (France)

    1995-12-31

    Cranial irradiation may result in altered hypothalamo-pituitary function in patients treated for cancer distant from this area. Growth hormone (GH) deficiency is the most frequent complication. The frequency, delay of occurrence and severity of GH deficiency depend on the irradiation dose delivered to this area. The other factors influencing the frequency are the age at irradiations and the fractionation schedule. The frequency of other hypothalamo-pituitary changes is also dose-dependent: thyrotropin and gonadotropin deficiencies occur in 50-60% of cases after 50 Gray, and corticotrophin deficiency in 30%. Low dose cranial irradiations may also induce precocious puberty (onset < 8 yr in girls and < 10 yr in boys). The radiation-induced lesions seem to occur in the hypothalamus rather than in the pituitary. There is generally a good correlation between the GH peak and the growth velocity, but there may be normal growth in spite of GH deficiency after low dose or due to precocious puberty, decreased growth velocity in spite of normal GH peak, due to bone irradiation. Results on final height have been optimized by a better indication of GH therapy and by its association with treatment of precocious puberty. (author). 19 refs.

  2. Neuroendocrine control of the onset of puberty.

    Science.gov (United States)

    Plant, Tony M

    2015-07-01

    This chapter is based on the Geoffrey Harris Memorial Lecture presented at the 8th International Congress of Neuroendocrinology, which was held in Sydney, August 2014. It provides the development of our understanding of the neuroendocrine control of puberty since Harris proposed in his 1955 monograph (Harris, 1955) that "a major factor responsible for puberty is an increased rate of release of pituitary gonadotrophin" and posited "that a neural (hypothalamic) stimulus, via the hypophysial portal vessels, may be involved." Emphasis is placed on the neurobiological mechanisms governing puberty in highly evolved primates, although an attempt is made to reverse translate a model for the timing of puberty in man and monkey to non-primate species. Copyright © 2015 Elsevier Inc. All rights reserved.

  3. Origins of knowledge: Insights from precocial species

    Directory of Open Access Journals (Sweden)

    Elisabetta eVersace

    2015-12-01

    Full Text Available Behavioural responses are influenced by knowledge acquired during the lifetime of an individual and by predispositions transmitted across generations. Establishing the origin of knowledge and the role of the unlearned component is a challenging task, given that both learned and unlearned knowledge can orient perception, learning, and the encoding of environmental features since the first stages of life. Ethical and practical issues constrain the investigation of unlearned knowledge in altricial species, including human beings. On the contrary, precocial animals can be tested on a wide range of tasks and capabilities immediately after birth and in controlled rearing conditions. Insects and precocial avian species are very convenient models to dissect the knowledge systems that enable young individuals to cope with their environment in the absence of specific previous experience. We present the state of the art of research on the origins of knowledge that come from different models and disciplines. Insects have been mainly used to investigate unlearned sensory preferences and prepared learning mechanisms. The relative simplicity of the neural system and fast life cycle of insects make them ideal models to investigate the neural circuitry and evolutionary dynamics of unlearned traits. Among avian species, chicks of the domestic fowl have been the focus of many studies, and showed to possess unlearned knowledge in the sensory, physical, spatial, numerical and social domains. Solid evidence shows the existence of unlearned knowledge in different domains in several species, from sensory and social preferences to the left-right representation of the mental number line. We show how non-mammalian models of cognition, and in particular precocial species, can shed light into the adaptive value and evolutionary history of unlearned knowledge.

  4. Origins of Knowledge: Insights from Precocial Species.

    Science.gov (United States)

    Versace, Elisabetta; Vallortigara, Giorgio

    2015-01-01

    Behavioral responses are influenced by knowledge acquired during the lifetime of an individual and by predispositions transmitted across generations. Establishing the origin of knowledge and the role of the unlearned component is a challenging task, given that both learned and unlearned knowledge can orient perception, learning, and the encoding of environmental features since the first stages of life. Ethical and practical issues constrain the investigation of unlearned knowledge in altricial species, including human beings. On the contrary, precocial animals can be tested on a wide range of tasks and capabilities immediately after birth and in controlled rearing conditions. Insects and precocial avian species are very convenient models to dissect the knowledge systems that enable young individuals to cope with their environment in the absence of specific previous experience. We present the state of the art of research on the origins of knowledge that comes from different models and disciplines. Insects have been mainly used to investigate unlearned sensory preferences and prepared learning mechanisms. The relative simplicity of the neural system and fast life cycle of insects make them ideal models to investigate the neural circuitry and evolutionary dynamics of unlearned traits. Among avian species, chicks of the domestic fowl have been the focus of many studies, and showed to possess unlearned knowledge in the sensory, physical, spatial, numerical and social domains. Solid evidence shows the existence of unlearned knowledge in different domains in several species, from sensory and social preferences to the left-right representation of the mental number line. We show how non-mammalian models of cognition, and in particular precocial species, can shed light into the adaptive value and evolutionary history of unlearned knowledge.

  5. The role of puberty in the making and breaking of young ballet dancers: Perspectives of dance teachers.

    Science.gov (United States)

    Mitchell, Siobhan B; Haase, Anne M; Malina, Robert M; Cumming, Sean P

    2016-02-01

    Physical changes associated with puberty may conflict with functional and aesthetic ideals for a career in ballet. The dance teacher is in a position to guide young dancers through the pubertal transition, although dancers rather than teachers are often the focus of research. This study explores the social stimulus value of the female body in ballet as perceived by the dance teacher and how value may change during puberty. Ten UK dance teachers were interviewed; interpretative phenomenological analysis was used. Four main themes perceived by dance teachers emerged as central to the social stimulus value of the body among adolescent dancers: the ideal body; teacher approaches to managing puberty in the dance environment; puberty as a 'make or break' stage in ballet; and teacher awareness of pubertal onset and the implications of timing. Dance teachers can play an important role in moderating external and individual expectations during the pubertal transition. Copyright © 2015 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.

  6. Leuprolide acetate-stimulated androgen response during female puberty.

    Science.gov (United States)

    Hernandez, María Isabel; Martinez-Aguayo, Alejandro; Cavada, Gabriel; Avila, Alejandra; Iñiguez, German; Mericq, Veronica

    2015-08-01

    A physiological increase in androgen levels occurs during adolescence. Measuring androgen concentrations is the best method to distinguish normal evolution processes from hyperandrogenic disorders. The increase in circulating androgens during puberty is inversely associated with insulin sensitivity in normal weight girls. To assess circulating levels of ovarian androgens and anti-Müllerian hormone (AMH) at baseline and after GnRH analogue (GnRH-a) stimulation in normal pubertal girls across different Tanner stages. We also studied the association between this response and insulin sensitivity. Prospective study of healthy girls (6-12 years) from the local community (n = 63). Tanner I (n = 23) subjects were assessed cross-sectionally, and Tanner II girls (n = 40) were evaluated every 6 months until they reached Tanner V. Early morning dehydroepiandrosterone sulphate (DHEA-S), AMH, sex hormone-binding globulin (SHBG), androstenedione, glucose and insulin levels were measured. A GnRH-a test (500 μg/m(2) ; sc) and oral glucose intolerance test (OGTT) were performed. Differences throughout puberty were evaluated. Basal and/or stimulated Testosterone DHEA-S and 17-hydroxyprogesterone (17OHP) were inversely associated with insulin sensitivity (WIBSI) from the beginning of puberty, whereas androstenedione was directly associated with gonadotrophins. AMH was inversely associated with basal and stimulated gonadotrophins and directly with insulin area under the curve (AUC) only in the early stages of puberty. 17OHP and testosterone responsiveness increased significantly during puberty in all subjects, whereas testosterone levels changed less consistently. This pattern of ovarian-steroidogenic response was most evident during mid- and late puberty. Moreover, during late puberty only, basal 17OHP, testosterone and DHEA-S were positively associated with gonadotrophins. In normal nonobese girls born appropriate for gestational age, androgen synthesis was associated with

  7. NEUROBEHAVIORAL RELATIONSHIPS AND PUBERTY - ANOTHER TRANSFORMATION

    NARCIS (Netherlands)

    SOORANILUNSING, RJ

    In a follow-up study of the Groningen Perinatal Project (GPP) on minor neurological dysfunction (MND) at 12 and 14 years the onset of puberty appeared to play a role. The children were selected on the presence (n = 185) and absence (n = 185) of MND at 9 years. Puberty was defined by the presence of

  8. Congenital hypogonadotropic hypogonadism: implications of absent mini-puberty.

    Science.gov (United States)

    Dwyer, Andrew A; Jayasena, Channa N; Quinton, Richard

    2016-06-01

    The phenomenon known as "mini-puberty" refers to activation of the neonatal hypothalamo-pituitary axis causing serum concentrations of gonadotrophins and testosterone (T) to approach adult male levels. This early neonatal period is a key proliferative window for testicular germ cells and immature Sertoli cells. Although failure to spontaneously initiate (adolescent) puberty is the most evident consequence of a defective gonadotropin-releasing hormone (GnRH) neurosecretory network, absent mini-puberty is also likely to have a major impact on the reproductive phenotype of men with congenital hypogonadotrophic hypogonadism (CHH). Furthermore, the phase of male mini-puberty represents a key window-of-opportunity to identify congenital GnRH deficiency (either isolated CHH, or as part of combined pituitary hormone deficiency) in childhood. Among male neonates exhibiting "red flag" indicators for CHH (i.e. maldescended testes with or without cryptorchidism) a single serum sample (between 4-8 weeks of life) can pinpoint congenital GnRH deficiency far more rapidly and with much greater accuracy than dynamic tests performed in later childhood or adolescence. Potential consequences for missing absent mini-puberty in a male neonate include the lack of monitoring of pubertal progression/lack of progression, and the missed opportunity for early therapeutic intervention. This article will review our current understanding of the mechanisms and clinical consequences of mini-puberty. Furthermore, evidence for the optimal clinical management of patients with absent mini-puberty will be discussed.

  9. The influence of puberty on subcortical brain development.

    Science.gov (United States)

    Goddings, Anne-Lise; Mills, Kathryn L; Clasen, Liv S; Giedd, Jay N; Viner, Russell M; Blakemore, Sarah-Jayne

    2014-03-01

    Puberty is characterized by hormonal, physical and psychological transformation. The human brain undergoes significant changes between childhood and adulthood, but little is known about how puberty influences its structural development. Using a longitudinal sample of 711 magnetic resonance imaging scans from 275 individuals aged 7-20years, we examined how subcortical brain regions change in relation to puberty. Our regions of interest included the amygdala, hippocampus and corpus striatum including the nucleus accumbens (NA), caudate, putamen and globus pallidus (GP). Pubertal development was significantly related to structural volume in all six regions in both sexes. Pubertal development and age had both independent and interactive influences on volume for the amygdala, hippocampus and putamen in both sexes, and the caudate in females. There was an interactive puberty-by-age effect on volume for the NA and GP in both sexes, and the caudate in males. These findings suggest a significant role for puberty in structural brain development. © 2013. Published by Elsevier Inc. All rights reserved.

  10. Van Wyk and Grumbach syndrome revisited: imaging and clinical findings in pre- and postpubertal girls

    Energy Technology Data Exchange (ETDEWEB)

    Browne, Lorna P.; Guillerman, R.P. [Texas Children' s Hospital, Department of Diagnostic Imaging, Houston, TX (United States); Boswell, Hillary B. [Texas Children' s Hospital, Department of Gynecology, Houston, TX (United States); Crotty, Eric J.; O' Hara, Sara M.; Birkemeier, Krista L. [Cincinnati Children' s Hospital Medical Center, Department of Radiology, Cincinnati, OH (United States)

    2008-05-15

    In 1960 Van Wyk and Grumbach described a syndrome of juvenile hypothyroidism, precocious puberty and ovarian enlargement. These findings undergo complete regression with thyroid hormone replacement therapy. This diagnosis can be made on the basis of imaging findings and thyroid function analysis, avoiding surgery. To relate the distinctive clinical and imaging features and putative pathophysiological mechanism of a series of patients with Van Wyk and Grumbach syndrome (VWGS). Patients with VWGS diagnosed at two large children's hospitals over a 6-year period beginning in 1999 were retrospectively reviewed. A literature review was also conducted. Five female patients were diagnosed with cystic ovarian enlargement and hypothyroidism at ages ranging from 9 to 17 years. Isosexual precocious puberty was found in prepubescent patients. Associated findings included delayed bone age, ascites, and pleural and pericardial effusions. Ovarian cyst involution occurred following treatment of the hypothyroidism. The association of primary hypothyroidism with cystic ovarian enlargement and precocious puberty is important to recognize. In the absence of suspected ovarian torsion, surgery is unnecessary, as cyst regression occurs after appropriate thyroid hormone replacement. Noncompliance with hormone replacement therapy should be considered when cystic ovarian enlargement is noted in patients with a history of hypothyroidism. (orig.)

  11. Testicular growth and development in puberty.

    Science.gov (United States)

    Koskenniemi, Jaakko J; Virtanen, Helena E; Toppari, Jorma

    2017-06-01

    To describe pubertal testicular growth in humans, changes in testicular cell populations that result in testicular growth, and the role of testosterone and gonadotrophins follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in testicular growth. When human data were not available, studies in nonhuman primates and/or rodents were used as surrogates. Testicular growth in puberty follows a sigmoidal growth curve, with a large variation in timing of testicular growth and adult testicular volume. Testicular growth early in puberty is due to increase in Sertoli cell number and length of seminiferous tubules, whereas the largest and fastest growth results from the increase in the diameter of the seminiferous tubules first due to spermatogonial proliferation and then due to the expansion of meiotic and haploid germ cells. FSH stimulates Sertoli cell and spermatogonial proliferation, whereas LH/testosterone is mandatory to complete spermatogenesis. However, FSH and LH/testosterone work in synergy and are both needed for normal spermatogenesis. Testicular growth during puberty is rapid, and mostly due to germ cell expansion and growth in seminiferous tubule diameter triggered by androgens. Pre-treatment with FSH before the induction of puberty may improve the treatment of hypogonadotropic hypogonadism, but remains to be proven.

  12. Public health implications of altered puberty timing

    DEFF Research Database (Denmark)

    Golub, M.S.; Collman, G.W.; Foster, P.M.

    2008-01-01

    sexual debut, potential sexual abuse, and psychosocial difficulties. Altered puberty timing is also of concern for the development of reproductive tract cancers later in life. For example, an early age of menarche is a risk factor for breast cancer. A low age at male puberty is associated...

  13. The effect of puberty on diurnal sodium regulation.

    Science.gov (United States)

    Mahler, B; Kamperis, K; Ankarberg-Lindgren, C; Djurhuus, J C; Rittig, S

    2015-11-15

    The aim of this study was to investigate the impact of sex and puberty stage on circadian changes in sodium excretion, sodium-regulating hormones, and hemodynamics. Thirty-nine healthy volunteers (9 prepuberty boys, 10 prepuberty girls, 10 puberty boys, and 10 puberty girls) were included. They all underwent a 24-h circadian in-patient study under standardized conditions regarding activity, diet, and fluid intake. Blood samples were drawn every 4 h, and the urine was collected in fractions. Blood pressure and heart rate were noninvasively monitored. Atrial natriuretic peptide (ANP), angiotensin II, aldosterone, and renin were measured in blood. Children in puberty had lower plasma levels of renin (Ppuberty group. There is a circadian rhythm of sodium excretion and sodium regulation in 7- to 15-yr-old children. This rhythm is similar in boys and girls. As an important new finding, puberty changes the plasma levels of renin and angiotensin II without changing the amount of sodium excreted or the day to night sodium excretion ratio. Copyright © 2015 the American Physiological Society.

  14. Trends in puberty timing in humans and environmental modifiers

    DEFF Research Database (Denmark)

    Toppari, Jorma; Juul, Anders

    2010-01-01

    Secular trends in timing of puberty appear to continue although under-nutrition has not been any longer a limiting factor for pubertal development. Now obesity and other environmental reasons have been suspected to cause this trend, and endocrine disrupting chemicals have become into focus...... as possible contributors. Epidemiological studies on endocrine disrupters are still scarce and show only weak associations between exposures and timing of puberty. Since genetic background explains 50-80% of variability in the timing of puberty, it is not surprising that the observed environmental effects...... are rather modest when individual exposures are assessed. Despite that, some exposures have been reported to be associated to early (e.g., polybrominated biphenyls) or delayed (e.g., lead) puberty. Here we shortly review the available data on recent trends in timing of puberty and the possible role...

  15. Timing of Puberty in Overweight Versus Obese Boys.

    Science.gov (United States)

    Lee, Joyce M; Wasserman, Richard; Kaciroti, Niko; Gebremariam, Achamyeleh; Steffes, Jennifer; Dowshen, Steven; Harris, Donna; Serwint, Janet; Abney, Dianna; Smitherman, Lynn; Reiter, Edward; Herman-Giddens, Marcia E

    2016-02-01

    Studies of the relationship of weight status with timing of puberty in boys have been mixed. This study examined whether overweight and obesity are associated with differences in the timing of puberty in US boys. We reanalyzed recent community-based pubertal data from the American Academy of Pediatrics' Pediatric Research in Office Settings study in which trained clinicians assessed boys 6 to 16 years for height, weight, Tanner stages, testicular volume (TV), and other pubertal variables. We classified children based on BMI as normal weight, overweight, or obese and compared median age at a given Tanner stage or greater by weight class using probit and ordinal probit models and a Bayesian approach. Half of boys (49.9%, n = 1931) were white, 25.8% (n = 1000) were African American, and 24.3% (n = 941) were Hispanic. For genital development in white and African American boys across a variety of Tanner stages, we found earlier puberty in overweight compared with normal weight boys, and later puberty in obese compared with overweight, but no significant differences for Hispanics. For TV (≥3 mL or ≥4 mL), our findings support earlier puberty for overweight compared with normal weight white boys. In a large, racially diverse, community-based sample of US boys, we found evidence of earlier puberty for overweight compared with normal or obese, and later puberty for obese boys compared with normal and overweight boys. Additional studies are needed to understand the possible relationships among race/ethnicity, gender, BMI, and the timing of pubertal development. Copyright © 2016 by the American Academy of Pediatrics.

  16. How Do Health Care Providers Diagnose Precocious Puberty and Delayed Puberty?

    Science.gov (United States)

    ... NICHD Research Information Find a Study More Information Pharmacology Condition Information NICHD Research Information Find a Study ... organs and blood flow in real time An MRI (magnetic resonance imaging) scan of the brain and ...

  17. Pubertal development in children diagnosed with diabetes mellitus type 1 before puberty.

    Science.gov (United States)

    Pereira, K C X; Pugliese, B S; Guimarães, M M; Gama, M P

    2015-02-01

    To investigate an association between pubertal development and timing of menarche with glycemic control, disease duration, and body mass index (BMI) in patients diagnosed with diabetes mellitus type 1 (DM1) before puberty. Retrospective study. The study was performed at the diabetes outpatient clinic of Instituto de Puericultura e Pediatria Martagão Gesteira--IPPMG of the Federal University of Rio de Janeiro--UFRJ. A total of 131 children, 61 girls and 70 boys, diagnosed with DM1 before puberty participated in the study. The study investigated how age at puberty onset relates to mean glycated hemoglobin (HbA1c) before puberty, BMI percentile, and disease duration; how puberty duration relates to mean HbA1c before and during puberty and to disease duration; and how timing of menarche relates to mean HbA1c before puberty, BMI percentile, and disease duration. Age at puberty onset was positively correlated with mean HbA1c before puberty (r = 0.204, R(2) = 0.042; P = .019) and disease duration (r = 0.451, R(2) = 0.203; P puberty later than those diagnosed more recently. Girls in higher BMI percentiles reached menarche sooner.

  18. Normal female puberty in a developmental perspective

    DEFF Research Database (Denmark)

    Bourguignon, Jean-Pierre; Juul, Anders

    2012-01-01

    Puberty is unique in the sense that its onset shows an extraordinary individual variability of about 5 years, the basis of which being still elusive despite research efforts to understand the reason why. Continuing changes in environmental influences and interaction with genetic determinants...... with less obvious changes in menarcheal age. Conceptually, puberty and subsequent reproduction appear now to be influenced by conditions not only at the time when they occur, but also during fetal and perinatal life. In addition, these influences can be apparently opposing since early maturation follows...... fetal malnourishment and postnatal overfeeding. In this review, the semiology and pathophysiology of puberty are discussed in a lifelong developmental perspective....

  19. Factors related to the occurrence of precocious menarche in female primary school students in Makassar

    Science.gov (United States)

    Renjani, Rizky Swastika; Mappaware, Nasrudin A.; Nontji, Werna; Marniati

    2017-09-01

    Precocious menarche currently affects 1 in 5000 girls and likely to occur as many as 10 times and possess greater risk to the emergence of cancer in women. The aim of this research is to determine the relationship of nutrition status and lipid profile with precocious menarche occurrence onstudents of primary school in Makassar city. The design of this research was cross sectional design. The samples werethe students of grades IV, V and VI who have already menarche occurrence as many as 20 studentscollected with purposive sampling. The data were analyzed with Mann Whitney U test. The results indicate that there are 17 students (85%) do not undergoprecocious menarche, normal nutrition status is 11 persons (55%), normal cholesterol levelis 12 persons (60%), and level of normal LDL = 19 persons (95%). While the respondents who undergo precocious menarche is 3 persons (15%), fat nutrition status is 9 persons (45%), cautious cholesterol level is 8 persons (40%) and cautious LDL level is 1 person (5%). Based on Mann Whitney U test, there is relationship between nutrition status and precocious menarche occurrence (p = 0.043) and there is correlation of total cholesterol and LDLcholesterollevelswith precocious menarche (p = 0.025) and (p = 0.017). The decrease of knowledge about health of reproduction can be promoted in school by making cooperation with nutritionist to give information to parents and students of primary schools about good and healthy food.

  20. [Age of puberty and western young women sexuality].

    Science.gov (United States)

    Tresch, C; Ohl, J

    2015-02-01

    The onset of menarche and age of first sexual experience have both lowered over the past century. Does the age of puberty influence the sexuality of the girl/young occidental woman? If so, to what degree? Besides, is the acquisition of reproductive function, regardless of age, a sign of sufficient maturity to engage in sexual activity? Studies show that early puberty, early sex, unprotected sexual intercourse in adolescence and number of sexual partners in early adulthood are closely related. These early sexual experiences could be stimulated by early drug use as well as by depressive disorders. The age of puberty has a real influence on sexuality but this link will be modulated by a number of social behavioral factors and it is not sustainable. The age of puberty is not a good indicator of maturity for teenage sexuality; early maturation and early sexual activity are usually associated with risky behaviors. However, other studies on the subject are required, including a consideration of the issues associated with delayed puberty, a subject virtually absent from the literature. Copyright © 2014 Elsevier Masson SAS. All rights reserved.

  1. Early metformin therapy (age 8-12 years) in girls with precocious pubarche to reduce hirsutism, androgen excess, and oligomenorrhea in adolescence.

    Science.gov (United States)

    Ibáñez, Lourdes; López-Bermejo, Abel; Díaz, Marta; Marcos, Maria Victoria; de Zegher, Francis

    2011-08-01

    Girls with a combined history of low(-normal) birth weight (LBW) and precocious pubarche (PP) are at high risk to develop polycystic ovary syndrome (PCOS). The objective of the study was to compare the capacity of early vs. late metformin treatment to prevent adolescent PCOS. This was a randomized, open-label study over 7 yr. The study was conducted at a university hospital. Thirty-eight LBW-PP girls were followed up from the mean age 8 until age 15 yr. Early metformin (study yr 1-4; age 8-12 yr) vs. late metformin (yr 6; age 13-14 yr). Measures included height; weight; hirsutism score; menstrual cycle; endocrine-metabolic screening (fasting; follicular phase); C-reactive protein; body composition (absorptiometry); abdominal fat partitioning (magnetic resonance imaging); ovarian morphology (ultrasound); PCOS (National Institutes of Health and Androgen Excess Society definitions) after yr 7 (all girls thus untreated for at least 1 yr). None of the girls dropped out of the study. At age 15 yr, early-metformin girls were taller (4 cm), were in a less proinflammatory state, and had less central fat due to reductions in visceral and hepatic fat. Hirsutism, androgen excess, oligomenorrhea, and PCOS were between 2- and 8-fold more prevalent in late- than early-treated girls. Abdominal adiposity was the first variable to diverge (at age 8-10 yr) between girls without vs. with PCOS at age 15 yr. In LBW-PP girls, early metformin therapy was found to prevent or delay the development of hirsutism, androgen excess, oligomenorrhea, and PCOS more effectively than late metformin. The time window of late childhood and early puberty may be more critical for the development, and thus for the prevention, of adolescent PCOS than the first years beyond menarche.

  2. A case of atypical McCune-Albright syndrome requiring optic nerve decompression.

    Science.gov (United States)

    Yavuzer, R; Khilnani, R; Jackson, I T; Audet, B

    1999-10-01

    McCune-Albright syndrome (MAS) is a disease of noninheritable, genetic origin defined by the triad of café-au-lait pigmentation of the skin, precocious puberty, and polyostotic fibrous dysplasia. This syndrome, which affects young girls primarily, has also been reported with other endocrinopathies, and rarely with acromegaly and hyperprolactinemia. The fibrous dysplasia in MAS is of the polyostotic type and, apart from the characteristic sites such as the proximal aspects of the femur and the pelvis, the craniofacial region is frequently involved. A male patient with MAS presented with juvenile gigantism, precocious puberty, pituitary adenoma-secreting growth hormone and prolactin, hypothalamic pituitary gonadal and thyroid dysfunction, and polyostotic fibrous dysplasia causing optic nerve compression. Visual deterioration and its surgical management are presented.

  3. The physiology and timing of male puberty

    DEFF Research Database (Denmark)

    Tinggaard, Jeanette; Mieritz, Mikkel Grunnet; Sørensen, Kaspar

    2012-01-01

    To describe available markers of male puberty, discuss associations between adiposity and pubertal timing and to review recent evidence of a possible secular trend in male pubertal timing.......To describe available markers of male puberty, discuss associations between adiposity and pubertal timing and to review recent evidence of a possible secular trend in male pubertal timing....

  4. Puberty in boys

    Science.gov (United States)

    Your body makes hormones to get puberty started. Here are some changes you will start seeing. You will: See your testicles and penis get bigger. Grow body hair. You may grow hair on your face around your upper lip, cheeks, and chin. You may see ...

  5. Salt tolerance of precocious-dwarf cashew rootstocks: physiological and growth indexes

    Directory of Open Access Journals (Sweden)

    Carneiro Paulo Torres

    2004-01-01

    Full Text Available The cashew crop (Anacardium occiedentale L. is of great economic and social importance for Northeast Brazil, a region usually affected by water and soil salinity. The present study was conducted in a greenhouse to evaluate the effects of four salinity levels established through electrical conductivity of irrigation water (ECw: 0.7, 1.4, 2.1 and 2.8 dS m-1, at 25ºC, on growth and physiological indexes of five rootstocks of dwarf-precocious cashew varieties CCP06, CCP09, CCP1001, EMBRAPA50, and EMBRAPA51. Plant height, leaf area, dry weight of root, shoot and total; water content of leaves, root/shoot ratio, leaf area ratio, absolute and relative growth rates and rate of net assimilation were evaluated. The majority of the evaluated variables were found to be affected by ECw and the effects varied among clones; however, no significant interactive effects were observed for factors. The value of ECw = 1.39 dS m-1 was considered as a threshold tolerance for the precocious cashew rootstocks used in this study. The dwarf-precocious cashew is moderately sensible to soil salinity during the formation phase of rootstock. Clones EMBRAPA51 and EMBRAPA50 presented, respectively, the least and the best development indexes.

  6. Puberdade precoce causada por tumores intracranianos: relato de 4 casos Pubertas praecox due to intracranial tumors: report of 4 cases

    Directory of Open Access Journals (Sweden)

    Reynaldo A. Brandt

    1974-12-01

    Full Text Available São relatados 4 casos de puberdade precoce conseqüentes a tumores intracranianos: um teratoma adulto do ventrículo lateral, um astrocitoma protoplasmático do terceiro ventrículo e diencéfalo, um astroblastoma do ter- ceiro ventrículo e diencéfalo e um hamartoma hipotalâmico. São apresentadas teorias que tentam explicar os mecanismos hormonais envolvidos e é salientada a importância do diagnóstico neuroradiológico preciso, pela possibilidade de cura em alguns casos e de tratamento satisfatório nos demais.Four cases of precocious puberty secondary to intracranial tumors are reported. A 3 year and 11 month old boy had a teratoma in the left lateral ventricle and total surgical excision was followed by recovery. An 8 year old girl with a protoplasmic astrocytoma of the third ventricle diagnosed by biopsy, followed by shunting and cobalt therapy was discharged improved. A five year old boy with an extensive astroblastoma of the diencephalon died following biopsy and shunting of cerebrospinal fluid. A posterior hypothalamic hamartoma totally excised from a 3 year old girl was followed by remission of the precocious puberty. The theories of hormonal mechanisms leading to precocious puberty are presented. It is stressed the importance of pneumoencephalography in the diagnosis of intracranial hamartomas, for they lack neurological signs.

  7. Evaluating methodological assumptions of a catch-curve survival estimation of unmarked precocial shorebird chickes

    Science.gov (United States)

    McGowan, Conor P.; Gardner, Beth

    2013-01-01

    Estimating productivity for precocial species can be difficult because young birds leave their nest within hours or days of hatching and detectability thereafter can be very low. Recently, a method for using a modified catch-curve to estimate precocial chick daily survival for age based count data was presented using Piping Plover (Charadrius melodus) data from the Missouri River. However, many of the assumptions of the catch-curve approach were not fully evaluated for precocial chicks. We developed a simulation model to mimic Piping Plovers, a fairly representative shorebird, and age-based count-data collection. Using the simulated data, we calculated daily survival estimates and compared them with the known daily survival rates from the simulation model. We conducted these comparisons under different sampling scenarios where the ecological and statistical assumptions had been violated. Overall, the daily survival estimates calculated from the simulated data corresponded well with true survival rates of the simulation. Violating the accurate aging and the independence assumptions did not result in biased daily survival estimates, whereas unequal detection for younger or older birds and violating the birth death equilibrium did result in estimator bias. Assuring that all ages are equally detectable and timing data collection to approximately meet the birth death equilibrium are key to the successful use of this method for precocial shorebirds.

  8. Features of Puberty Onset in Children Born to Fathers with Burdened Radiation Anamnesis. Neurohormonal Mechanisms

    Directory of Open Access Journals (Sweden)

    O.I. Plekhova

    2014-04-01

    Full Text Available The study was conducted to determine the neurohormonal mechanisms that underlie the clinical features of puberty onset in children born to parents exposed to low-dose irradiation. Hormonal homeostasis is assessed according to the data of immune-enzyme, radioimmune, and fluorometric methods. Statistical analysis of the data was carried out by means of the application package Excel and Statgrafics-5, SPSS 17.0. It has been established that the earlier puberty onset is caused by accelerated stimulation of pituitary-gonadal system due to activation of central mechanisms of pituitary gonadotrophic function regulation and eary reversal of melatonin blockage of this system. Reasonable basis has been suggested for careful clinical supervision over development of the reproductive system of the children from families with burdened radiation history.

  9. Control of the onset of puberty.

    Science.gov (United States)

    Livadas, Sarantis; Chrousos, George P

    2016-08-01

    The mechanism of puberty initiation remains an enigma, despite extensive research in the field. Pulsatile pituitary gonadotropin secretion under the guidance of hypothalamic gonadotropin-releasing hormone (GnRH) constitutes a sine qua non for pubertal onset. In turn, the secretion of GnRH in the human hypothalamus is regulated by kisspeptin and its receptor as well as by permissive or opposing signals mediated by neurokinin B and dynorphin acting on their respective receptors. These three supra-GnRH regulators compose the Kisspeptin, Neurokinin B and Dynorhin neurons (KNDy) system, a key player in pubertal onset and progression. The recent discovery that makorin ring finger protein 3 is also involved in puberty initiation provided further insights into the regulation of the KNDy pathway. In fact, the inhibitory (γ-amino butyric acid, neuropeptide Y, and RFamide-related peptide-3) and stimulatory signals (glutamate) acting upstream of KNDy called into question the role of makorin ring finger protein 3 as the gatekeeper of puberty. Meanwhile, the findings that 'neuroestradiol' produced locally and endocrine disruptors from the environment may influence GnRH secretion is intriguing. Finally, epigenetic mechanisms have been implicated in pubertal onset through recently discovered mechanisms. The exact molecular machinery underlying puberty initiation in humans is under intensive investigation. In this review, we summarize research evidence in the field, while emphasizing the areas of uncertainty and underlining the impact of current information on the evolving theory regarding this fascinating phenomenon.

  10. Back pain reporting in young girls appears to be puberty-related

    Directory of Open Access Journals (Sweden)

    Froberg Karsten

    2005-11-01

    Full Text Available Abstract Background There is a large increase in back pain reporting in the early teens. In no previous study has the prevalence of low back pain been investigated in relation to the onset of puberty. The objective of this study was to establish whether the onset of puberty is associated with back pain reporting in young girls. Methods A subsample of 254 girls aged 8–10 years and 165 girls aged 14–16 years from a cross-sectional survey of 481 children aged 8–10 years and 325 adolescents aged 14–16 years of both sexes. Main outcome measures were back pain defined as low back pain, mid back pain, and/or neck pain in the past month. Other variables of interest were Puberty (five different stages, age, body mass index, and smoking. Independent information on onset of puberty was obtained through a physical examination and on back pain through an individual structured interview. The association was studied between onset of puberty and the outcome variable (the one month period prevalence of back pain, controlling for overweight, and smoking. Odds ratios with 95% confidence intervals were used to describe bivariate associations, logistic regression with robust standard errors was used for multivariate analyses. Results There is a highly significant trend for increased back pain reporting with increasing level of puberty until maturity is reached. The biggest leap appears between the second level (beginning of puberty and the third level (mid puberty and the findings remain after controlling for the covariates. These results emanate from the low back, whereas pain in the mid back and neck do not seem to be linked with pubertal stage. Conclusion In girls, the reporting of low back pain increases in frequency during puberty until maturity, regardless of age. Why some girls are susceptible to back pain in the early stage of puberty is unknown.

  11. Trends in puberty timing in humans and environmental modifiers

    DEFF Research Database (Denmark)

    Toppari, Jorma; Juul, Anders

    2010-01-01

    Secular trends in timing of puberty appear to continue although under-nutrition has not been any longer a limiting factor for pubertal development. Now obesity and other environmental reasons have been suspected to cause this trend, and endocrine disrupting chemicals have become into focus...... as possible contributors. Epidemiological studies on endocrine disrupters are still scarce and show only weak associations between exposures and timing of puberty. Since genetic background explains 50-80% of variability in the timing of puberty, it is not surprising that the observed environmental effects...

  12. Delayed puberty and hypogonadotropic hypogonadism. Differential diagnosis and treatment

    NARCIS (Netherlands)

    Snoep, Marinus Cornelis

    1978-01-01

    This thesis describes a method enabling a prospecrive differential diagnosis to be made berween delayed puberty (DP) and hypogonadotropic hypogonadism (HH). The influence of androgen administration on the gonadal feedback sysrem of patients with delayed puberty was also studied. ... Zie: Summary

  13. Early Female Puberty: A Review of Research on Etiology and Implications

    Science.gov (United States)

    Daniel, Eileen; Balog, Linda F.

    2009-01-01

    The age of female puberty appears to have decreased in the United States and western countries as child health and nutrition have improved and obesity has become more prevalent. Also, environmental contaminants, particularly endocrine disruptors, may also play a role in lowering the age of puberty. Puberty at an early age increases the risk of…

  14. Early metabolic programming of puberty onset: impact of changes in postnatal feeding and rearing conditions on the timing of puberty and development of the hypothalamic kisspeptin system

    DEFF Research Database (Denmark)

    Castellano, Juan M; Bentsen, Agnete H; Sánchez-Garrido, Miguel A

    2011-01-01

    the timing of puberty; however, the potential underlying mechanisms remain poorly defined. Here we report how changes in the pattern of postnatal feeding affect the onset of puberty and evaluate key hormonal and neuropeptide [Kiss1/kisspeptin (Kp)] alterations linked to these early nutritional manipulations...... of puberty, together with higher levels of leptin and hypothalamic Kiss1 mRNA. Conversely, postnatal underfeeding caused a persistent reduction in body weight, lower ovarian and uterus weights, and delayed vaginal opening, changes that were paralleled by a decrease in leptin and Kiss1 mRNA levels. Kisspeptin...... at puberty were similar in all groups, except for enhanced responsiveness to low doses of Kp-10 in postnatally underfed rats. In conclusion, our data document that the timing of puberty is sensitive to both overfeeding and subnutrition during early (postnatal) periods and suggest that alterations...

  15. BMI change during puberty and the risk of heart failure.

    Science.gov (United States)

    Kindblom, J M; Bygdell, M; Sondén, A; Célind, J; Rosengren, A; Ohlsson, C

    2018-03-12

    Hospitalization for heart failure amongst younger men has increased. The reason for this is unknown but it coincides with the obesity epidemic. The aim of this study was to evaluate the association between childhood BMI (Body Mass Index) and BMI change during puberty for risk of adult heart failure in men. Using the BMI Epidemiology Study (BEST), a population-based study in Gothenburg, Sweden, we collected information on childhood BMI at age 8 years and BMI change during puberty (BMI at age 20 - BMI at 8) for men born 1945-1961, followed until December 2013 (n = 37 670). BMI was collected from paediatric growth charts and mandatory military conscription tests. Information on heart failure was retrieved from high-quality national registers (342 first hospitalizations for heart failure). BMI change during puberty was independently of childhood BMI associated with risk of heart failure in a nonlinear J-shaped manner. Subjects in the upper quartile of BMI change during puberty (Q4) had more than twofold increased risk of heart failure compared with subjects in Q1 [HR (Hazard Ratio) = 2.29, 95% CI (Confidence Interval) 1.68-3.12]. Childhood BMI was not independently associated with risk of heart failure. Boys developing overweight during puberty (HR 3.14; 95% CI 2.25-4.38) but not boys with childhood overweight that normalized during puberty (HR 1.12, 95% CI 0.63-2.00) had increased risk of heart failure compared with boys without childhood or young adult overweight. BMI change during puberty is a novel risk factor for adult heart failure in men. © 2018 The Association for the Publication of the Journal of Internal Medicine.

  16. Transition in endocrinology: induction of puberty.

    Science.gov (United States)

    Dunkel, Leo; Quinton, Richard

    2014-06-01

    Puberty is the period during which we attain adult secondary sexual characteristics and reproductive capability. Its onset depends upon reactivation of pulsative GNRH, secretion from its relative quiescence during childhood, on the background of intact potential for pituitary-gonadal function. This review is intended: to highlight those current practices in diagnosis and management that are evidence based and those that are not; to help clinicians deal with areas of uncertainty with reference to physiologic first principles; by sign-posting relevant data arising from other patient groups with shared issues; to illustrate how recent scientific advances are (or should be) altering clinician perceptions of pubertal delay; and finally, to emphasise that the management of men and women presenting in advanced adult life with absent puberty cannot simply be extrapolated from paediatric practice. There is a broad spectrum of pubertal timing that varies among different populations, separated in time and space. Delayed puberty usually represents an extreme of the normal, a developmental pattern referred to as constitutional delay of growth and puberty (CDGP), but organic defects of the hypothalamo-pituitary-gonadal axis predisposing to hypogonadism may not always be initially distinguishable from it. CDGP and organic, or congenital hypogonadotrophic hypogonadism are both significantly more common in boys than girls. Moreover, around 1/3 of adults with organic hypogonadotrophic hypogonadism had evidence of partial puberty at presentation and, confusingly, some 5-10% of these subsequently may exhibit recovery of endogenous gonadotrophin secretion, including men with Kallmann syndrome. However, the distinction is crucial as expectative ('watch-and-wait') management is inappropriate in the context of hypogonadism. The probability of pubertal delay being caused by organic hypogonadism rises exponentially both with increasing age at presentation and the presence of associated 'red

  17. Concerns Girls Have about Puberty

    Science.gov (United States)

    ... Stages Listen Español Text Size Email Print Share Concerns Girls Have About Puberty Page Content Article Body Girls have pubertal concerns and worries, too, including: Breast Development Some girls ...

  18. Aromatase inhibitors in men: effects and therapeutic options

    Directory of Open Access Journals (Sweden)

    de Jong Frank H

    2011-06-01

    Full Text Available Abstract Aromatase inhibitors effectively delay epiphysial maturation in boys and improve testosterone levels in adult men Therefore, aromatase inhibitors may be used to increase adult height in boys with gonadotropin-independent precocious puberty, idiopathic short stature and constitutional delay of puberty. Long-term efficacy and safety of the use of aromatase inhibitors has not yet been established in males, however, and their routine use is therefore not yet recommended.

  19. Puberty and structural brain development in humans.

    Science.gov (United States)

    Herting, Megan M; Sowell, Elizabeth R

    2017-01-01

    Adolescence is a transitional period of physical and behavioral development between childhood and adulthood. Puberty is a distinct period of sexual maturation that occurs during adolescence. Since the advent of magnetic resonance imaging (MRI), human studies have largely examined neurodevelopment in the context of age. A breadth of animal findings suggest that sex hormones continue to influence the brain beyond the prenatal period, with both organizational and activational effects occurring during puberty. Given the animal evidence, human MRI research has also set out to determine how puberty may influence otherwise known patterns of age-related neurodevelopment. Here we review structural-based MRI studies and show that pubertal maturation is a key variable to consider in elucidating sex- and individual- based differences in patterns of human brain development. We also highlight the continuing challenges faced, as well as future considerations, for this vital avenue of research. Copyright © 2016. Published by Elsevier Inc.

  20. Is Puberty Education Evident in Australia's First National Curriculum?

    Science.gov (United States)

    Collier-Harris, Christine A.; Goldman, Juliette D. G.

    2017-01-01

    The processes of puberty, including reproductive fertility and social-role transitions, now begin earlier, last longer, and are experienced in very different contexts. Because of this, all children and adolescents need good-quality puberty education in school curricula, and this need is supported by positive cost-benefit analysis and international…

  1. Environmental pollutants and dysregulation of male puberty--a comparison among species.

    Science.gov (United States)

    Magnusson, Ulf; Ljungvall, Karl

    2014-04-01

    The scientific literature on altered onset of puberty predominantly involves studies on females. This paper reviews current knowledge on the role of environmental pollutants in dysregulation of male puberty in humans, laboratory rodents and farm animals. The methods used to determine the onset of puberty are well developed in humans and farm animals, and standardized across studies in humans. In laboratory rodents standardized external morphological endpoints are used. There is an increasing weight of evidence from epidemiological studies in humans, as well as from experiments in animals, indicating that environmental pollutants dysregulate puberty in males. Most data are from studies on "classical" persistent environmental pollutants. Assessing the effect of multichemical environmental pollution on dysregulation of puberty in humans is more challenging; further solid epidemiological data would likely contribute most to our understanding, especially if combined with systematically collected field-data from selected wildlife. Copyright © 2014 The Authors. Published by Elsevier Inc. All rights reserved.

  2. Childhood family disruption and adult height: is there a mediating role of puberty?

    Science.gov (United States)

    Sheppard, Paula; Garcia, Justin R; Sear, Rebecca

    2015-11-24

    Childhood family background is known to be associated with child growth and development, including the onset of puberty, but less is known about the influence of childhood family disruption on outcomes in later life. Given the associations between early family disruption and childhood development, we predicted that there may be long-term health-relevant consequences of childhood disruption. Using data from a large US interview sample (n = 16 207), we test if death or divorce of parents, at different childhood periods, was associated with adult stature, and whether age at puberty mediated this relationship, for men and women. RESULTS MEN: : parental death and divorce during early childhood was associated with shorter adult height, and later puberty. Later puberty was associated with shorter adult height. Path analyses demonstrated that the relationship between parental divorce and height was completely mediated by age at puberty; although parental death was only partially mediated by age at puberty. WOMEN: the father's death during early childhood was associated with earlier puberty, which was in turn associated with shorter adult stature. The relationship between paternal death and height is entirely mediated by age at puberty; no evidence of a direct relationship between childhood family disruption and adult height. Early childhood familial disruption is associated with shorter height for men, and is partially mediated by later puberty. For women, the relationship between father's death, and height was completely mediated by earlier puberty. These findings indicate that disruption during childhood can have long-reaching health repercussions, particularly for boys. © The Author(s) 2015. Published by Oxford University Press on behalf of the Foundation for Evolution, Medicine, and Public Health.

  3. Age at puberty and the emerging obesity epidemic

    DEFF Research Database (Denmark)

    Aksglaede, Lise; Juul, Anders; Olsen, Lina W

    2009-01-01

    BACKGROUND: Recent studies have shown that puberty starts at younger ages than previously. It has been hypothesized that the increasing prevalence of childhood obesity is contributing to this trend. The purpose of this study was to analyze the association between prepubertal body mass index (BMI...... was significantly inversely associated with age at OGS and PHV. Dividing the children into five levels of prepubertal BMI, we found a similar secular trend toward earlier maturation in all BMI groups. CONCLUSION/SIGNIFICANCE: The heavier both boys and girls were at age seven, the earlier they entered puberty....... Irrespective of level of BMI at age seven, there was a downward trend in the age at attaining puberty in both boys and girls, which suggests that the obesity epidemic is not solely responsible for the trend....

  4. Substance p regulates puberty onset and fertility in the female mouse.

    Science.gov (United States)

    Simavli, Serap; Thompson, Iain R; Maguire, Caroline A; Gill, John C; Carroll, Rona S; Wolfe, Andrew; Kaiser, Ursula B; Navarro, Víctor M

    2015-06-01

    Puberty is a tightly regulated process that leads to reproductive capacity. Kiss1 neurons are crucial in this process by stimulating GnRH, yet how Kiss1 neurons are regulated remains unknown. Substance P (SP), an important neuropeptide in pain perception, induces gonadotropin release in adult mice in a kisspeptin-dependent manner. Here, we assessed whether SP, through binding to its receptor NK1R (neurokinin 1 receptor), participates in the timing of puberty onset and fertility in the mouse. We observed that 1) selective NK1R agonists induce gonadotropin release in prepubertal females; 2) the expression of Tac1 (encoding SP) and Tacr1 (NK1R) in the arcuate nucleus is maximal before puberty, suggesting increased SP tone; 3) repeated exposure to NK1R agonists prepubertally advances puberty onset; and 4) female Tac1(-/-) mice display delayed puberty; moreover, 5) SP deficiency leads to subfertility in females, showing fewer corpora lutea and antral follicles and leading to decreased litter size. Thus, our findings support a role for SP in the stimulation of gonadotropins before puberty, acting via Kiss1 neurons to stimulate GnRH release, and its involvement in the attainment of full reproductive capabilities in female mice.

  5. Precocious metamorphosis in the juvenile hormone-deficient mutant of the silkworm, Bombyx mori.

    Directory of Open Access Journals (Sweden)

    Takaaki Daimon

    Full Text Available Insect molting and metamorphosis are intricately governed by two hormones, ecdysteroids and juvenile hormones (JHs. JHs prevent precocious metamorphosis and allow the larva to undergo multiple rounds of molting until it attains the proper size for metamorphosis. In the silkworm, Bombyx mori, several "moltinism" mutations have been identified that exhibit variations in the number of larval molts; however, none of them have been characterized molecularly. Here we report the identification and characterization of the gene responsible for the dimolting (mod mutant that undergoes precocious metamorphosis with fewer larval-larval molts. We show that the mod mutation results in complete loss of JHs in the larval hemolymph and that the mutant phenotype can be rescued by topical application of a JH analog. We performed positional cloning of mod and found a null mutation in the cytochrome P450 gene CYP15C1 in the mod allele. We also demonstrated that CYP15C1 is specifically expressed in the corpus allatum, an endocrine organ that synthesizes and secretes JHs. Furthermore, a biochemical experiment showed that CYP15C1 epoxidizes farnesoic acid to JH acid in a highly stereospecific manner. Precocious metamorphosis of mod larvae was rescued when the wild-type allele of CYP15C1 was expressed in transgenic mod larvae using the GAL4/UAS system. Our data therefore reveal that CYP15C1 is the gene responsible for the mod mutation and is essential for JH biosynthesis. Remarkably, precocious larval-pupal transition in mod larvae does not occur in the first or second instar, suggesting that authentic epoxidized JHs are not essential in very young larvae of B. mori. Our identification of a JH-deficient mutant in this model insect will lead to a greater understanding of the molecular basis of the hormonal control of development and metamorphosis.

  6. Endocrine Disorders in Childhood: A Selective Survey of Intellectual and Educational Sequelae.

    Science.gov (United States)

    Sandberg, David E.; Barrick, Christopher

    1995-01-01

    Examines intellectual and educational sequelae of selected endocrine systems and the psychosocial impact of their medical conditions. Many conditions are named including: Growth Hormone Deficiency, Turner Syndrome, Precocious Puberty, Klinefelters Syndrome, Congenital Hypothyroidism, and Insulin-Dependent Diabetes Mellitus. Gives psychoeducational…

  7. 21 CFR 862.1275 - Estrogens (total, nonpregnancy) test system.

    Science.gov (United States)

    2010-04-01

    ..., estradiol, and estriol) in plasma, serum, and urine of males and nonpregnant females. Measurement of... infertility, amenorrhea (absence of menses) differentiation of primary and secondary ovarian malfunction, estrogen secreting testicular and ovarian tumors, and precocious puberty in females. (b) Classification...

  8. Epigenetic regulation of puberty via Zinc finger protein-mediated transcriptional repression.

    Science.gov (United States)

    Lomniczi, Alejandro; Wright, Hollis; Castellano, Juan Manuel; Matagne, Valerie; Toro, Carlos A; Ramaswamy, Suresh; Plant, Tony M; Ojeda, Sergio R

    2015-12-16

    In primates, puberty is unleashed by increased GnRH release from the hypothalamus following an interval of juvenile quiescence. GWAS implicates Zinc finger (ZNF) genes in timing human puberty. Here we show that hypothalamic expression of several ZNFs decreased in agonadal male monkeys in association with the pubertal reactivation of gonadotropin secretion. Expression of two of these ZNFs, GATAD1 and ZNF573, also decreases in peripubertal female monkeys. However, only GATAD1 abundance increases when gonadotropin secretion is suppressed during late infancy. Targeted delivery of GATAD1 or ZNF573 to the rat hypothalamus delays puberty by impairing the transition of a transcriptional network from an immature repressive epigenetic configuration to one of activation. GATAD1 represses transcription of two key puberty-related genes, KISS1 and TAC3, directly, and reduces the activating histone mark H3K4me2 at each promoter via recruitment of histone demethylase KDM1A. We conclude that GATAD1 epitomizes a subset of ZNFs involved in epigenetic repression of primate puberty.

  9. The effects of puberty on white matter development in boys.

    Science.gov (United States)

    Menzies, Lara; Goddings, Anne-Lise; Whitaker, Kirstie J; Blakemore, Sarah-Jayne; Viner, Russell M

    2015-02-01

    Neuroimaging studies demonstrate considerable changes in white matter volume and microstructure during adolescence. Most studies have focused on age-related effects, whilst puberty-related changes are not well understood. Using diffusion tensor imaging and tract-based spatial statistics, we investigated the effects of pubertal status on white matter mean diffusivity (MD) and fractional anisotropy (FA) in 61 males aged 12.7-16.0 years. Participants were grouped into early-mid puberty (≤Tanner Stage 3 in pubic hair and gonadal development; n=22) and late-post puberty (≥Tanner Stage 4 in pubic hair or gonadal development; n=39). Salivary levels of pubertal hormones (testosterone, DHEA and oestradiol) were also measured. Pubertal stage was significantly related to MD in diverse white matter regions. No relationship was observed between pubertal status and FA. Regression modelling of MD in the significant regions demonstrated that an interaction model incorporating puberty, age and puberty×age best explained our findings. In addition, testosterone was correlated with MD in these pubertally significant regions. No relationship was observed between oestradiol or DHEA and MD. In conclusion, pubertal status was significantly related to MD, but not FA, and this relationship cannot be explained by changes in chronological age alone. Copyright © 2014 The Authors. Published by Elsevier Ltd.. All rights reserved.

  10. Effects of puberty on cystic fibrosis related pulmonary exacerbations in women versus men.

    Science.gov (United States)

    Sutton, Shelby; Rosenbluth, Daniel; Raghavan, Deepa; Zheng, Jie; Jain, Raksha

    2014-01-01

    Epidemiologic data from studies of airway diseases, such as asthma, chronic obstructive pulmonary disease, and cystic fibrosis indicate a gender disparity where women have worse outcomes. The explanation for this is largely unknown. We hypothesize that female sex hormones play a role in this gender disparity, predisposing women to more exacerbations and decreased lung function post-puberty. In Cystic Fibrosis, to determine if puberty marks a point of increasing exacerbations and decreasing lung function in women relative to men. Using the United States Cystic Fibrosis Foundation Patient Registry, we used linear regression to compare lung function and rate of pulmonary exacerbations in men versus women before and after puberty. Of 5,137 subjects who met inclusion criteria, 2,689 were male and 2,448 were female. Average age of puberty was found to be 13.2 ± 2.2 years in men and 11.2 ± 2.0 years of age in women. Percent predicted FEV1 pre- and post-puberty were no different between males versus females (P = 0.44 pre-puberty and P = 0.16 post-puberty). In contrast, women had a significantly higher rate of pulmonary exacerbations post-puberty than men (1.17 ± 1.35 exacerbations per year in women versus 0.95 ± 1.27 in men; P puberty, the rate of pulmonary exacerbations increased in adolescent women relative to men with cystic fibrosis, supporting a role for sex hormones in the disease process. Further understanding of the mechanisms that modulate sex hormone receptors in airway disease may serve as future targets for therapy. © 2013 Wiley Periodicals, Inc.

  11. [Relevant factors of early puberty timing in urban primary schools in Chongqing].

    Science.gov (United States)

    Luo, Yan; Liu, Qin; Wen, Yi; Liu, Shudan; Lei, Xun; Wang, Hong

    2016-05-01

    To investigate the status of puberty timing and relevant factors of early puberty timing in children from grade one to four in urban primary schools of Chongqing. According to the purposive sample method, four urban primary schools in Chongqing were selected and of which 1471 children from grade one to four who have obtained informed consent were recruited. Questionnaire survey on social-demographic characteristics and family environment (e.g., age, parents' relationship, diet and lifestyle, etc), and Pubertal Development Scale (PDS) survey and physical examination (measurements of height, weight, pubertal development status, etc) were conducted. P25, P50, P75 ages of each important pubertal event were calculated by probit regression. Univariate and multivariate analysis were used to analyze relevant factors. The detection rate of early puberty timing was 17.7%, and the median ages of the onset of breast and testicular development were 10.77 and 11.48 years old, respectively. Multivariate logistic regression showed that early puberty timing occurred more likely in girls than in boys (OR = 0.561, 95% CI 0.406-0.774), and bad relationship between parents (OR = 1.320, 95% CI 1.007-1.729) and hair-products-use (OR = 1.685, 95%, CI 1.028-2.762) were risk factors of early puberty timing. Early onset of puberty in urban Chongqing is still exist. Gender, parents' relationship, and hair-products-use have an essential impact on early puberty timing.

  12. Shared genetic aetiology of puberty timing between sexes and with health-related outcomes.

    Science.gov (United States)

    Day, Felix R; Bulik-Sullivan, Brendan; Hinds, David A; Finucane, Hilary K; Murabito, Joanne M; Tung, Joyce Y; Ong, Ken K; Perry, John R B

    2015-11-09

    Understanding of the genetic regulation of puberty timing has come largely from studies of rare disorders and population-based studies in women. Here, we report the largest genomic analysis for puberty timing in 55,871 men, based on recalled age at voice breaking. Analysis across all genomic variants reveals strong genetic correlation (0.74, P=2.7 × 10(-70)) between male and female puberty timing. However, some loci show sex-divergent effects, including directionally opposite effects between sexes at the SIM1/MCHR2 locus (Pheterogeneity=1.6 × 10(-12)). We find five novel loci for puberty timing (Ppuberty, LEPR and KAL1. Finally, we identify genetic correlations that indicate shared aetiologies in both sexes between puberty timing and body mass index, fasting insulin levels, lipid levels, type 2 diabetes and cardiovascular disease.

  13. Testes and brain gene expression in precocious male and adult maturing Atlantic salmon (Salmo salar

    Directory of Open Access Journals (Sweden)

    Houeix Benoit

    2010-03-01

    Full Text Available Abstract Background The male Atlantic salmon generally matures in fresh water upon returning after one or several years at sea. Some fast-growing male parr develop an alternative life strategy where they sexually mature before migrating to the oceans. These so called 'precocious' parr or 'sneakers' can successfully fertilise adult female eggs and so perpetuate their line. We have used a custom-built cDNA microarray to investigate gene expression changes occurring in the salmon gonad and brain associated with precocious maturation. The microarray has been populated with genes selected specifically for involvement in sexual maturation (precocious and adult and in the parr-smolt transformation. Results Immature and mature parr collected from a hatchery-reared stock in January were significantly different in weight, length and condition factor. Changes in brain expression were small - never more than 2-fold on the microarray, and down-regulation of genes was much more pronounced than up-regulation. Significantly changing genes included isotocin, vasotocin, cathepsin D, anamorsin and apolipoprotein E. Much greater changes in expression were seen in the testes. Among those genes in the testis with the most significant changes in expression were anti-Mullerian hormone, collagen 1A, and zinc finger protein (Zic1, which were down-regulated in precocity and apolipoproteins E and C-1, lipoprotein lipase and anti-leukoproteinase precursor which were up-regulated in precocity. Expression changes of several genes were confirmed in individual fish by quantitative PCR and several genes (anti-Mullerian hormone, collagen 1A, beta-globin and guanine nucleotide binding protein (G protein beta polypeptide 2-like 1 (GNB2L1 were also examined in adult maturing testes. Down-regulation of anti-Mullerian hormone was judged to be greater than 160-fold for precocious males and greater than 230-fold for November adult testes in comparison to July testes by this method. For

  14. Evaluation of pineal calcification in children. Using both CT and plain radiographs

    Energy Technology Data Exchange (ETDEWEB)

    Ando, Kazuo; Odagiri, Kunio; Fujiwara, Takuya; Tanohata, Kazunori; Matsui, Kengo; Okano, Shigeki

    1987-07-01

    The study cases were 804 patients who had received either CT or plain radiographs for some reasons. Their ages ranged from newborn to 15 years old. Twenty four patients had the pineal calcification, in which one patient had the pineal region tumor and 4 patients had precocious puberty. The incidence of the pineal calcification was observed on CT as 0.2, 5.8, and 14 % in their age of 0 to 5, 6 to 10, and 11 to 15 years old, respectively. On the other hand, this finding was detected only in 0, 1.1, and 1.2 % on plain radiographs. In conclusion, pineal calcification on CT may suggest the pathological state in children. Although it is observed in a minority of normal children, such a calcification could be looked upon as not only pineal region tumor but precocious puberty and other intracranial disorders with suspicion.

  15. Evaluation of pineal calcification in children

    International Nuclear Information System (INIS)

    Ando, Kazuo; Odagiri, Kunio; Fujiwara, Takuya; Tanohata, Kazunori; Matsui, Kengo; Okano, Shigeki.

    1987-01-01

    The study cases were 804 patients who had received either CT or plain radiographs for some reasons. Their ages ranged from newborn to 15 years old. Twenty four patients had the pineal calcification, in which one patient had the pineal region tumor and 4 patients had precocious puberty. The incidence of the pineal calcification was observed on CT as 0.2, 5.8, and 14 % in their age of 0 to 5, 6 to 10, and 11 to 15 years old, respectively. On the other hand, this finding was detected only in 0, 1.1, and 1.2 % on plain radiographs. In conclusion, pineal calcification on CT may suggest the pathological state in children. Although it is observed in a minority of normal children, such a calcification could be looked upon as not only pineal region tumor but precocious puberty and other intracranial disorders with suspicion. (author)

  16. Does salt have a permissive role in the induction of puberty?

    Science.gov (United States)

    Pitynski, Dori; Flynn, Francis W; Skinner, Donal C

    2015-10-01

    Puberty is starting earlier than ever before and there are serious physiological and sociological implications as a result of this development. Current research has focused on the potential role of high caloric, and commensurate high adiposity, contributions to early puberty. However, girls with normal BMI also appear to be initiating puberty earlier. Westernized diets, in addition to being high in fat and sugar, are also high in salt. To date, no research has investigated a link between elevated salt and the reproductive axis. We hypothesize that a high salt diet can result in an earlier onset of puberty through three mechanisms that are not mutually exclusive. (1) High salt activates neurokinin B, a hormone that is involved in both the reproductive axis and salt regulation, and this induces kisspeptin release and ultimate activation of the reproductive axis. (2) Vasopressin released in response to high salt acts on vasopressin receptors expressed on kisspeptin neurons in the anteroventral periventricular nucleus, thereby stimulating gonadotropin releasing hormone and subsequently luteinizing hormone secretion. (3) Salt induces metabolic changes that affect the reproductive axis. Specifically, salt acts indirectly to modulate adiposity, ties in with the obesity epidemic, and further compounds the pathologic effects of obesity. Our overall hypothesis offers an additional cause behind the induction of puberty and provides testable postulates to determine the mechanism of potential salt-mediated affects on puberty. Copyright © 2015. Published by Elsevier Ltd.

  17. Improving the assessment of endocrine disrupting chemical (EDC) effects on puberty

    Science.gov (United States)

    During puberty, key developmental events occur that are critical for normal adult male and female reproductive maturation. Recent studies raised concern that exposure to environmental chemicals alter the normal progression through puberty and lead to impaired reproductive functio...

  18. Role of environmental factors in the timing of puberty

    DEFF Research Database (Denmark)

    Euling, S.Y.; Selevan, S.G.; Pescovitz, O.H.

    2008-01-01

    Puberty-timing measures have historically been used as indicators of adequate nutrition and growth. More recently, these measures have been examined in relation to exposure to estrogenic or antiandrogenic agents, as well as other environmental factors. The scientific community has debated whether...... puberty timing is occurring earlier today than in the mid-1900s in the United States and, if so, whether environmental factors play a role; however, no one has asked a multidisciplinary panel to resolve this question. Thus, a multidisciplinary expert panel jointly sponsored by the US Environmental...... Protection Agency, the National Institute of Environmental Health Sciences, and Serono Symposia International was convened to examine the evidence of a secular trend, identify potential environmental factors of concern, and identify research needs regarding environmental factors and puberty timing at "The...

  19. Timing of puberty and physical growth in obese children: a longitudinal study in boys and girls.

    Science.gov (United States)

    De Leonibus, C; Marcovecchio, M L; Chiavaroli, V; de Giorgis, T; Chiarelli, F; Mohn, A

    2014-08-01

    To assess whether puberty and physical growth vary in obese when compared to normal-weight children. One hundred obese pre-pubertal children (44 boys; mean age (±SD): 9.01 ± 0.62 years; 56 girls; 8.70 ± 0.57 years) were compared to 55 normal-weight controls (27 boys; 9.17 ± 0.26 years; 28 girls; 8.71 ± 0.62 years). All study participants were followed prospectively with 6-monthly follow-up visits. At each study visit, height, weight, body mass index (BMI) and pubertal stage were assessed. Obese children entered puberty and achieved later stages of puberty earlier than controls (onset of puberty: boys: 11.66 ± 1.00 vs. 12.12 ± 0.91 years, P = 0.049; girls: 9.90 ± 0.78 vs. 10.32 ± 1.70, P = 0.016; late puberty: boys: 13.33 ± 0.71 vs. 14.47 ± 1.00 years, P puberty (β = -0.506, P puberty (β = -0.514, P puberty and completion of puberty and an impaired height gain during puberty. © 2013 The Authors. Pediatric Obesity © 2013 International Association for the Study of Obesity.

  20. 21 CFR 862.1680 - Testosterone test system.

    Science.gov (United States)

    2010-04-01

    ... measure testosterone (a male sex hormone) in serum, plasma, and urine. Measurement of testosterone are used in the diagnosis and treatment of disorders involving the male sex hormones (androgens), including primary and secondary hypogonadism, delayed or precocious puberty, impotence in males and, in females...

  1. Lung volume and expiratory flow rates from pre- to post-puberty.

    Science.gov (United States)

    Smith, Joshua R; Emerson, Sam R; Kurti, Stephanie P; Gandhi, Kirti; Harms, Craig A

    2015-08-01

    The purpose was to determine if the airways and lungs grow disproportionately from pre- to post-puberty in boys and girls. We hypothesized that the airways grow at a slower rate than lung volume (i.e. dysanapsis growth) during puberty and boys would exhibit more dysanaptic growth compared to girls. Twenty-one pre-pubescent children [11 boys (pre 10.1 ± 0.5 years, post 15.3 ± 0.5 years); 10 girls (pre 9.4 ± 1.0 years, post 14.1 ± 1.0 years)] performed pulmonary function tests (PFTs) ~5 years ago from an original cohort of 40 children. These 21 children performed PFTs, which included forced vital capacity (FVC) and forced expiratory flow at 50 % FVC (FEF50). Static pressure at 50 % of FVC [Pst(L)50 %] was estimated based on age. Dysanapsis ratio (DR) was calculated [FEF50 × FVC(-1) × Pst(L) 50 % (-1) ]. Maturation status was determined via Tanner stages. Stage of maturation was not different (p > 0.05) between boys and girls (4.2 ± 0.6 stage vs. 3.7 ± 0.7 stage, respectively). FVC and FEF50 increased (p 0.05) from pre- to post-puberty. FEF50 and FVC significantly increased and DR decreased (p puberty for both sexes. Post-puberty, boys had a significantly larger FVC, but FEF50, DR, and FEF50/FVC were not different (p > 0.05) compared to girls. These data suggest that dysanaptic growth occurs during puberty and that it is not different between boys and girls.

  2. Acquired versus innate prey capturing skills in super-precocial live-bearing fish

    NARCIS (Netherlands)

    Lankheet, Martin J.; Stoffers, Twan; Leeuwen, van Johan L.; Pollux, Bart J.A.

    2016-01-01

    Live-bearing fish start hunting for mobile prey within hours after birth, an example of extreme precociality. Because prenatal, in utero, development of this behaviour is constrained by the lack of free-swimming sensory-motor interactions, immediate success after birth depends on innate,

  3. Cardiometabolic risk factors and insulin resistance in obese children and adolescents: relation to puberty.

    Science.gov (United States)

    Tobisch, B; Blatniczky, L; Barkai, L

    2015-02-01

    The prevalence of obesity with concomitant increasing risk for having cardiometabolic diseases is rising in the childhood population. Insulin resistance has a key role in metabolic changes in these children. Insulin levels elevate as puberty commences in every individual. Children with increased risk for cardiometabolic diseases show significant differences in insulin levels even before the onset of puberty compared with those without risks. The pattern of appearance of dyslipidaemia also varies in children with risk factors even in the pre-pubertal group from those without risk. Children with metabolic syndrome display considerably pronounced changes in their metabolic parameters before the onset of puberty, which become more pronounced as puberty passes. Insulin resistance (IR) has a key role in the metabolic changes in obese children. In commencing puberty, the insulin levels elevate. It is not clear, however, how insulin levels develop if the metabolic syndrome appears. Metabolic changes were assessed in obese children before, during and after puberty to analyse the relationship between IR and puberty in subjects with and without metabolic syndrome. Three hundred thirty-four obese children (5-19 years) attended the study. The criteria of the International Diabetes Federation were used to assess the presence of cardiometabolic risks (CMRs). Subjects with increased CMR were compared with those without risk (nCMR). Pubertal staging, lipid levels, plasma glucose and insulin levels during oral glucose tolerance test were determined in each participant. IR was expressed by homeostasis model assessment (HOMA-IR) and the ratio of glucose and insulin areas under the curve (AUC-IR). Significantly higher AUC-IR were found in pre-pubertal CMR children compared with nCMR subjects (11.84 ± 1.03 vs. 8.00 ± 0.69; P puberty. HOMA-IR differs between CMR and nCMR only in post-puberty (6.03 ± 1.26 vs. 2.54 ± 0.23; P puberty. CMR is associated with increased

  4. Descriptive review: hormonal influences on risk for eating disorder symptoms during puberty and adolescence.

    Science.gov (United States)

    Harden, K Paige; Kretsch, Natalie; Moore, Sarah R; Mendle, Jane

    2014-11-01

    Puberty is an important period of risk for the onset of eating pathology in adolescent females. This review focuses on changes in reproductive hormones during puberty as one specific psychopathogenic mechanism. Studies of puberty and eating disorder-related phenotypes were identified using search databases and the reference sections of previous literature. Correlational studies of adult women and experimental studies of animals provide evidence for the effects of reproductive hormones on eating disorder symptoms. Very few studies of puberty, however, have directly measured or tested the effects of hormonal change in samples of human adolescents. Commonly used measures of pubertal development, such as menarche or self-reported pubertal status, are relatively poor indicators of individual differences in hormones. The extent to which puberty-related hormonal change accounts for elevated risk for disordered eating remains unclear. Future research is necessary to elucidate the specific relations between hormonal change during puberty and risk for disordered eating. In particular, there is a need for longitudinal studies with multivariate measurement of pubertal development, including direct measures of change in reproductive hormones. © 2014 Wiley Periodicals, Inc.

  5. The role of estrogen in bone growth and formation: changes at puberty

    Directory of Open Access Journals (Sweden)

    Divya Singh

    2010-12-01

    Full Text Available Divya Singh1, Sabyasachi Sanyal2, Naibedya Chattopadhyay11Division of Endocrinology, 2Division of Drug Target Discovery and Development, Central Drug Research Institute (Council of Scientific and Industrial Research, Lucknow, Uttar Pradesh, IndiaAbstract: A high peak bone mass (PBM at skeletal maturity is a good predictor for lower rate of fracture risks in later life. Growth during puberty contributes significantly to PBM achievement in women and men. The growth hormone (GH/insulin-like growth factor 1 (IGF-1 axis has a critical role in pubertal bone growth. There is an increase in GH and IGF-1 levels during puberty; thus, it is assumed that sex steroids contribute to higher GH/IGF-1 action during growth. Recent studies indicate that estrogen increases GH secretion in boys and girls, and the major effect of testosterone on GH secretion is via aromatization to estrogen. Estrogen is pivotal for epiphyseal fusion in young men and women. From studies of individuals with a mutated aromatase gene and a case study of male patient with defective estrogen receptor-alpha (ER-α, it is clear that estrogen is indispensable for normal pubertal growth and growth plate fusion. ER-α and estrogen receptor-beta (ER-β have been localized in growth plate and bone. ER knockout studies have shown that ER-α-/- female mice have reduced linear appendicular growth, while ER-β-/- mice have increased appendicular growth. No such effect is seen in ER-β-/- males; however, repressed growth is seen in ER-α-/- males, resulting in shorter long bones. Thus, ER-β represses longitudinal bone growth in female mice, while it has no function in the regulation of longitudinal bone growth in male mice. These findings indicate that estrogen plays a critical role in skeletal physiology of males as well as females.Keywords: peak bone mass, puberty, estrogen, growth plate

  6. McCune-Albright syndrome: evaluation of craniofacial involvement through magnetic resonance images

    International Nuclear Information System (INIS)

    Poma, A.; Baganz, M.; Gutierrez, G.

    1999-01-01

    We report the case of a male teenager with the classical clinical picture of McCune-Albright syndrome, with precocious puberty, cafe-au-lait spots, polyostotic fibrous dysplasia and gigantism. Magnetic resonance images are described and a review of the perspective literature is also presented. (authors)

  7. Hamartomas of the tuber cinereum

    Energy Technology Data Exchange (ETDEWEB)

    Galanski, M.; Braemswig, J.H.; Korinthenberg, R.

    1986-03-01

    Hamartomas of the tuber cinereum are tumour-like collections of normal tissue in abnormal location. They are benign lesions with slow or absent growth and without any tendency to neoplastic evolution. Due to their neurosecreting properties they usually cause precocious puberty. Further neuroendocrine disturbances, seizures, or psychoneurological symptoms may be associated in some cases. Cisternography and CT are the most conclusive radiologic procedures in almost all cases. The typical feature is a well circumscribed round-shaped isodense soft tissue mass without contrast enhancement. Usually the tumour is small, rarely exceeding 2 cm, in diameter. If CT diagnosis is not conclusive, examination in the coronal plane or CT cisternography are recommended. Although CT does not permit a histological diagnosis the clinical and radiological features together are sufficient to make a highly suggestive diagnosis. The treatment of choice is medical therapy. Surgery should be restricted to those tumours which damage surrounding structures by their size and cause other symptoms than precocious puberty.

  8. Hamartomas of the tuber cinereum

    International Nuclear Information System (INIS)

    Galanski, M.; Braemswig, J.H.; Korinthenberg, R.; Muenster Univ.

    1986-01-01

    Hamartomas of the tuber cinereum are tumour-like collections of normal tissue in abnormal location. They are benign lesions with slow or absent growth and without any tendency to neoplastic evolution. Due to their neurosecreting properties they usually cause precocious puberty. Further neuroendocrine disturbances, seizures, or psychoneurological symptoms may be associated in some cases. Cisternography and CT are the most conclusive radiologic procedures in almost all cases. The typical feature is a well circumscribed round-shaped isodense soft tissue mass without contrast enhancement. Usually the tumour is small, rarely exceeding 2 cm, in diameter. If CT diagnosis is not conclusive, examination in the coronal plane or CT cisternography are recommended. Although CT does not permit a histological diagnosis the clinical and radiological features together are sufficient to make a highly suggestive diagnosis. The treatment of choice is medical therapy. Surgery should be restricted to those tumours which damage surrounding structures by their size and cause other symptoms than precocious puberty. (orig.) [de

  9. Endocrine sequelae after radiotherapy in childhood and adolescence; Sequelas endocrinas da radioterapia no tratamento do cancer na infancia e adolescencia

    Energy Technology Data Exchange (ETDEWEB)

    Couto-Silva, Ana Claudia; Adan, Luis Fernando [Universidade Federal da Bahia, Salvador, BA (Brazil); Brauner, Raja [Paris-5 Univ. (France)

    2005-10-15

    Radiotherapy may result in endocrine abnormalities, osteoporosis, obesity and neurological sequelae in patients treated for cancer. In the hypothalamo-pituitary area, GH deficiency is the most frequent complication. The frequency, delay of appearance and severity of GH deficiency depend most on the dose delivered during cranial irradiation but variables as age at treatment and fractionation schedule may play an important role as well. Other hypothalamo-pituitary dysfunctions are also dose-dependent. Low dose cranial irradiation may induce precocious or early puberty, while high doses are related to gonadotropin deficiency. Endocrine complications due to extracranial irradiation such as gonadal or thyroid abnormalities are described. In spite of normal GH secretion, linear growth may be impaired by bone lesions secondary to craniospinal or total body irradiation. Results on final height have been optimized by better indicators of GH therapy associated with adequate treatment of early or precocious puberty. The purpose of this review is to explore the late endocrine sequelae of radiotherapy. (author)

  10. Endocrine sequelae after radiotherapy in childhood and adolescence

    International Nuclear Information System (INIS)

    Couto-Silva, Ana Claudia; Adan, Luis Fernando; Brauner, Raja

    2005-01-01

    Radiotherapy may result in endocrine abnormalities, osteoporosis, obesity and neurological sequelae in patients treated for cancer. In the hypothalamo-pituitary area, GH deficiency is the most frequent complication. The frequency, delay of appearance and severity of GH deficiency depend most on the dose delivered during cranial irradiation but variables as age at treatment and fractionation schedule may play an important role as well. Other hypothalamo-pituitary dysfunctions are also dose-dependent. Low dose cranial irradiation may induce precocious or early puberty, while high doses are related to gonadotropin deficiency. Endocrine complications due to extracranial irradiation such as gonadal or thyroid abnormalities are described. In spite of normal GH secretion, linear growth may be impaired by bone lesions secondary to craniospinal or total body irradiation. Results on final height have been optimized by better indicators of GH therapy associated with adequate treatment of early or precocious puberty. The purpose of this review is to explore the late endocrine sequelae of radiotherapy. (author)

  11. Classic congenital adrenal hyperplasia and puberty.

    Science.gov (United States)

    Charmandari, Evangelia; Brook, Charles G D; Hindmarsh, Peter C

    2004-11-01

    Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive disorders resulting from deficiency of one of the five enzymes required for synthesis of cortisol in the adrenal cortex. The most common form of the disease is classic 21-hydroxylase deficiency, which is characterized by decreased synthesis of glucocorticoids and often mineralocorticoids, adrenal hyperandrogenism and impaired development and function of the adrenal medulla. The clinical management of classic 21-hydroxylase deficiency is often suboptimal, and patients are at risk of developing in tandem iatrogenic hypercortisolism and/or hyperandogenism. Limitations of current medical therapy include the inability to control hyperandrogenism without employing supraphysiologic doses of glucocorticoid, hyperresponsiveness of the hypertrophied adrenal glands to adrenocorticotropic hormone (ACTH) and difficulty in suppressing ACTH secretion from the anterior pituitary. Puberty imposes increased difficulty in attaining adrenocortical suppression despite optimal substitution therapy and adherence to medical treatment. Alterations in the endocrine milieu at puberty may influence cortisol pharmacokinetics and, consequently, the handling of hydrocortisone used as replacement therapy. Recent studies have demonstrated a significant increase in cortisol clearance at puberty and a shorter half-life of free cortisol in pubertal females compared with males. Furthermore, children with classic CAH have elevated fasting serum insulin concentrations and insulin resistance. The latter may further enhance adrenal and/or ovarian androgen secretion, decrease the therapeutic efficacy of glucocorticoids and contribute to later development of the metabolic syndrome and its complications.

  12. The Emerging Role of Epigenetics in the Regulation of Female Puberty.

    Science.gov (United States)

    Lomniczi, Alejandro; Ojeda, Sergio R

    2016-01-01

    In recent years the pace of discovering the molecular and genetic underpinnings of the pubertal process has accelerated considerably. Genes required for human puberty to occur have been identified and evidence has been provided suggesting that the initiation of puberty requires coordinated changes in the output of a multiplicity of genes organized into functional networks. Recent evidence suggests that a dual mechanism of epigenetic regulation affecting the transcriptional activity of neurons involved in stimulating gonadotropin-releasing hormone release plays a fundamental role in the timing of puberty. The Polycomb group (PcG) of transcriptional silencers appears to be a major component of the repressive arm of this mechanism. PcG proteins prevent the premature initiation of female puberty by silencing the Kiss1 gene in kisspeptin neurons of the arcuate nucleus (ARC) of the hypothalamus. Because the abundance of histone marks either catalyzed by--or associated with--the Trithorax group (TrxG) of transcriptional activators increases at the time when PcG control subsides, it appears that the TrxG complex is the counteracting partner of PcG-mediated gene silencing. In this chapter, we discuss the concept that a switch from epigenetic repression to activation within ARC kisspeptin neurons is a core mechanism underlying the initiation of female puberty. © 2016 S. Karger AG, Basel.

  13. Molecular mechanism underlying juvenile hormone-mediated repression of precocious larval-adult metamorphosis.

    Science.gov (United States)

    Kayukawa, Takumi; Jouraku, Akiya; Ito, Yuka; Shinoda, Tetsuro

    2017-01-31

    Juvenile hormone (JH) represses precocious metamorphosis of larval to pupal and adult transitions in holometabolous insects. The early JH-inducible gene Krüppel homolog 1 (Kr-h1) plays a key role in the repression of metamorphosis as a mediator of JH action. Previous studies demonstrated that Kr-h1 inhibits precocious larval-pupal transition in immature larva via direct transcriptional repression of the pupal specifier Broad-Complex (BR-C). JH was recently reported to repress the adult specifier gene Ecdysone-induced protein 93F (E93); however, its mechanism of action remains unclear. Here, we found that JH suppressed ecdysone-inducible E93 expression in the epidermis of the silkworm Bombyx mori and in a B. mori cell line. Reporter assays in the cell line revealed that the JH-dependent suppression was mediated by Kr-h1. Genome-wide ChIP-seq analysis identified a consensus Kr-h1 binding site (KBS, 14 bp) located in the E93 promoter region, and EMSA confirmed that Kr-h1 directly binds to the KBS. Moreover, we identified a C-terminal conserved domain in Kr-h1 essential for the transcriptional repression of E93 Based on these results, we propose a mechanism in which JH-inducible Kr-h1 directly binds to the KBS site upstream of the E93 locus to repress its transcription in a cell-autonomous manner, thereby preventing larva from bypassing the pupal stage and progressing to precocious adult development. These findings help to elucidate the molecular mechanisms regulating the metamorphic genetic network, including the functional significance of Kr-h1, BR-C, and E93 in holometabolous insect metamorphosis.

  14. Influences on the onset and tempo of puberty in human beings and implications for adolescent psychological development.

    Science.gov (United States)

    Lee, Yvonne; Styne, Dennis

    2013-07-01

    This article is part of a Special Issue "Puberty and Adolescence". Historical records reveal a secular trend toward earlier onset of puberty in both males and females, often attributed to improvements in nutrition and health status. The trend stabilized during the mid 20th century in many countries, but recent studies describe a recurrence of a decrease in age of pubertal onset. There appears to be an associated change in pubertal tempo in girls, such that girls who enter puberty earlier have a longer duration of puberty. Puberty is influenced by genetic factors but since these effects cannot change dramatically over the past century, environmental effects, including endocrine disrupting chemicals (EDCs), and perinatal conditions offer alternative etiologies. Observations that the secular trends in puberty in girls parallel the obesity epidemic provide another plausible explanation. Early puberty has implications for poor behavioral and psychosocial outcomes as well as health later in life. Irrespective of the underlying cause of the ongoing trend toward early puberty, experts in the field have debated whether these trends should lead clinicians to reconsider a lower age of normal puberty, or whether such a new definition will mask a pathologic etiology. Copyright © 2013 Elsevier Inc. All rights reserved.

  15. Maturation of kisspeptinergic neurons coincides with puberty onset in male rats

    DEFF Research Database (Denmark)

    Bentsen, Agnete H; Ansel, Laura; Simonneaux, Valerie

    2010-01-01

    receptor is the primary component in the initiation of puberty and where in the hypothalamus regulation of the kisspeptin/Kiss1R system occurs is unresolved. Using immunohistochemistry and in situ hybridization, we analyzed the level of Kiss1 mRNA and kisspeptin-immunoreactivity in the anteroventral...... periventricular nucleus (AVPV) and the arcuate nucleus of male rats along pubertal development. Neurons expressing Kiss1 mRNA were first detected at PND15, but increased significantly around puberty, and declined again in the adult rat. While virtually no immunoreactive cell bodies were detectable in the AVPV...... that the regulation of kisspeptin synthesis and release are key events in puberty onset in the male rat....

  16. Sex hormone-binding globulin levels predict insulin sensitivity, disposition index, and cardiovascular risk during puberty

    DEFF Research Database (Denmark)

    Sørensen, Kaspar; Aksglaede, Lise; Munch-Andersen, Thor

    2009-01-01

    Early puberty is associated with increased risk of subsequent cardiovascular disease. Low sex hormone-binding globulin (SHBG) levels are a feature of early puberty and of conditions associated with increased cardiovascular risk. The aim of the present study was to evaluate SHBG as a predictor...... of glucose metabolism and metabolic risk during puberty....

  17. Environmental factors and puberty timing: expert panel research needs

    DEFF Research Database (Denmark)

    Louis, G.M. Buck; Jr, L.E. Gray; Marcus, M.

    2008-01-01

    initiatives include (1) etiologic research that focus on environmentally relevant levels of endocrine-disrupting chemicals and body size in relation to normal puberty as well as its variants, (2) exposure assessment of relevant endocrine-disrupting chemicals during critical windows of human development......, body size, and puberty. The panel concluded that available experimental animal and human data support a possible role of endocrine-disrupting chemicals and body size in relation to alterations in pubertal onset and progression in boys and girls. Critical data gaps prioritized for future research...

  18. Incomplete McCune-Albright Syndrome: A Case Report

    Directory of Open Access Journals (Sweden)

    Nagehan Aslan

    2014-08-01

    Full Text Available Fibrous dysplasia of bone is a genetic, non-inheritable disease that can cause bone pain, bone deformities and fracture. It has a large clinic spectrum from benign monostotic fibrous dysplasia to McCune-Albright syndrome. Rare McCune-Albright syndrome is characterized by precocious puberty, cafe au lait spots and fibrous dysplasia. Herein we presented a case who was preferred to hospital with pathological fractures and diagnosed with Incomplet McCune Albright syndrome because of the lack of endocrine hyperfunction and developed early puberty at clinical course.

  19. [Soy isoflavones and human health: breast cancer and puberty timing].

    Science.gov (United States)

    Valladares, Luis; Garrido, Argelia; Sierralta, Walter

    2012-04-01

    Accumulated exposure to high levels of estrogen is associated with an increased incidence of breast cancer. Thus, factors such as early puberty, late menopause and hormone replacement therapy are considered to be risk factors, whereas early childbirth, breastfeeding and puberty at a later age are known to consistently decrease the lifetime breast cancer risk. Epidemiological studies suggest that consumption of isoflavones correlates with a lower incidence of breast cancer. Data from human intervention studies show that the effects of isoflavones on early breast cancer markers differ between pre- and post-menopausal women. The reports from experimental animals (rats and mice) on mammary tumors are variable. These results taken together with heterogeneous outcomes of human interventions, have led to a controversy surrounding the intake of isoflavones to reduce breast cancer risk. This review summarizes recent studies and analyzes factors that could explain the variability of results. In mammary tissue, from the cellular endocrine viewpoint, we analyze the effect of isoflavones on the estrogen receptor and their capacity to act as agonists or antagonists. On the issue of puberty timing, we analyze the mechanisms by which girls, but not boys, with higher prepuberal isoflavone intakes appear to enter puberty at a later age.

  20. Postinjection Muscle Fibrosis from Lupron

    Directory of Open Access Journals (Sweden)

    Erica Everest

    2015-01-01

    Full Text Available We describe the case of a 6.5-year-old girl with central precocious puberty (CPP, which signifies the onset of secondary sexual characteristics before the age of eight in females and the age of nine in males as a result of stimulation of the hypothalamic-pituitary-gonadal axis. Her case is likely related to her adoption, as children who are adopted internationally have much higher rates of CPP. She had left breast development at Tanner Stage 2, adult body odor, and mildly advanced bone age. In order to halt puberty and maximize adult height, she was prescribed a gonadotropin releasing hormone analog, the first line treatment for CPP. She was administered Lupron (leuprolide acetate Depot-Ped (3 months intramuscularly. After her second injection, she developed swelling and muscle pain at the injection site on her right thigh. She also reported an impaired ability to walk. She was diagnosed with muscle fibrosis. This is the first reported case of muscle fibrosis resulting from Lupron injection.

  1. Role of Kisspeptin and Neurokinin B in Puberty in Female Non-Human Primates

    OpenAIRE

    Ei Terasawa; Ei Terasawa; James P. Garcia; Stephanie B. Seminara; Kim L. Keen

    2018-01-01

    In human patients, loss-of-function mutations in the genes encoding kisspeptin (KISS1) and neurokinin B (NKB) and their receptors (KISS1R and NK3R, respectively) result in an abnormal timing of puberty or the absence of puberty. To understand the neuroendocrine mechanism of puberty, we investigated the contribution of kisspeptin and NKB signaling to the pubertal increase in GnRH release using rhesus monkeys as a model. Direct measurements of GnRH and kisspeptin in the median eminence of the h...

  2. Talking to Your Child about Puberty

    Science.gov (United States)

    ... should know about puberty ahead of time. Many kids receive some sex education at school. Often, though, the lessons are ... January 2015 More on this topic for: Parents Kids Teens Sexual Development Questions and Answers About Sex A Parent's Guide to Surviving the Teen Years ...

  3. Serum inhibin B levels during male childhood and puberty

    DEFF Research Database (Denmark)

    Andersson, A M; Skakkebaek, N E

    2001-01-01

    Inhibin B is a testicular peptide hormone that regulates FSH secretion in a negative feedback loop. In males serum levels of inhibin B are detectable throughout life with prominent changes in the first year of life and during puberty. Serum inhibin B is normally detectable throughout childhood...... normal or near-normal levels are seen in cryptorchidism and disorders with preserved Sertoli cell function in spite of absence of germ cells or impaired androgen biosynthesis or action. During puberty a developmental change in the regulation of serum inhibin B occurs. In contrast to childhood inhibin B...

  4. Central Application of IGF-1 Postpones Time of Vaginal Opening in Normally Fed, but Not in Food-Restricted Rats

    NARCIS (Netherlands)

    Zeinoaldini, S.; Swarts, J.J.M.; Heijning, van de B.J.M.

    2006-01-01

    Background/Aims: Central but also peripheral IGF-1 is suggested to play a role in the initiation of puberty as it directly affects GnRH synthesis and release. A possible intermediate in the effects of IGF-1 on puberty might be the adiposity-signaling hormone leptin, whose plasma levels are decreased

  5. Puberty suppression in adolescents with gender identity disorder: a prospective follow-up study.

    Science.gov (United States)

    de Vries, Annelou L C; Steensma, Thomas D; Doreleijers, Theo A H; Cohen-Kettenis, Peggy T

    2011-08-01

    Puberty suppression by means of gonadotropin-releasing hormone analogues (GnRHa) is used for young transsexuals between 12 and 16 years of age. The purpose of this intervention is to relieve the suffering caused by the development of secondary sex characteristics and to provide time to make a balanced decision regarding actual gender reassignment. To compare psychological functioning and gender dysphoria before and after puberty suppression in gender dysphoric adolescents. Of the first 70 eligible candidates who received puberty suppression between 2000 and 2008, psychological functioning and gender dysphoria were assessed twice: at T0, when attending the gender identity clinic, before the start of GnRHa; and at T1, shortly before the start of cross-sex hormone treatment. Behavioral and emotional problems (Child Behavior Checklist and the Youth-Self Report), depressive symptoms (Beck Depression Inventory), anxiety and anger (the Spielberger Trait Anxiety and Anger Scales), general functioning (the clinician's rated Children's Global Assessment Scale), gender dysphoria (the Utrecht Gender Dysphoria Scale), and body satisfaction (the Body Image Scale) were assessed. Behavioral and emotional problems and depressive symptoms decreased, while general functioning improved significantly during puberty suppression. Feelings of anxiety and anger did not change between T0 and T1. While changes over time were equal for both sexes, compared with natal males, natal females were older when they started puberty suppression and showed more problem behavior at both T0 and T1. Gender dysphoria and body satisfaction did not change between T0 and T1. No adolescent withdrew from puberty suppression, and all started cross-sex hormone treatment, the first step of actual gender reassignment. Puberty suppression may be considered a valuable contribution in the clinical management of gender dysphoria in adolescents. © 2010 International Society for Sexual Medicine.

  6. Examination of US puberty-timing data from 1940 to 1994 for secular trends

    DEFF Research Database (Denmark)

    Euling, Susan Y; Herman-Giddens, Marcia E; Lee, Peter A

    2008-01-01

    or girls. A majority of the panelists agreed that data are sufficient to suggest a trend toward an earlier breast development onset and menarche in girls but not for other female pubertal markers. A minority of panelists concluded that the current data on girls' puberty timing for any marker...... are insufficient. Almost all panelists concluded, on the basis of few studies and reliability issues of some male puberty markers, that current data for boys are insufficient to evaluate secular trends in male pubertal development. The panel agreed that altered puberty timing should be considered an adverse effect......Whether children, especially girls, are entering and progressing through puberty earlier today than in the mid-1900s has been debated. Secular trend analysis, based on available data, is limited by data comparability among studies in different populations, in different periods of time, and using...

  7. Early Puberty, Negative Peer Influence, and Problem Behaviors in Adolescent Girls

    Science.gov (United States)

    Elliott, Marc N.; Davies, Susan; Tortolero, Susan R.; Cuccaro, Paula; Schuster, Mark A.

    2014-01-01

    OBJECTIVE: To determine how early puberty and peer deviance relate to trajectories of aggressive and delinquent behavior in early adolescence and whether these relationships differ by race/ethnicity. METHODS: In this longitudinal study, 2607 girls from 3 metropolitan areas and their parents were interviewed at ages 11, 13, and 16 years. Girls reported on their age of onset of menarche, best friend’s deviant behavior, delinquency, and physical, relational, and nonphysical aggression. Parents provided information on family sociodemographic characteristics and girls’ race/ethnicity. RESULTS: Sixteen percent of girls were classified as early maturers (defined by onset of menarche before age 11 years). Overall, relational and nonphysical aggression increased from age 11 to age 16, whereas delinquency and physical aggression remained stable. Early puberty was associated with elevated delinquency and physical aggression at age 11. The relationship with early puberty diminished over time for physical aggression but not for delinquency. Best friend’s deviant behavior was linked with higher levels of all problem behaviors, but the effect lessened over time for most outcomes. Early puberty was associated with a stronger link between best friend’s deviance and delinquency, suggesting increased vulnerability to negative peer influences among early-maturing girls. A similar vulnerability was observed for relational and nonphysical aggression among girls in the “other” racial/ethnic minority group only. CONCLUSIONS: Early puberty and friends’ deviance may increase the risk of problem behavior in young adolescent girls. Although many of these associations dissipate over time, early-maturing girls are at risk of persistently higher delinquency and stronger negative peer influences. PMID:24324002

  8. Early puberty, negative peer influence, and problem behaviors in adolescent girls.

    Science.gov (United States)

    Mrug, Sylvie; Elliott, Marc N; Davies, Susan; Tortolero, Susan R; Cuccaro, Paula; Schuster, Mark A

    2014-01-01

    To determine how early puberty and peer deviance relate to trajectories of aggressive and delinquent behavior in early adolescence and whether these relationships differ by race/ethnicity. In this longitudinal study, 2607 girls from 3 metropolitan areas and their parents were interviewed at ages 11, 13, and 16 years. Girls reported on their age of onset of menarche, best friend's deviant behavior, delinquency, and physical, relational, and nonphysical aggression. Parents provided information on family sociodemographic characteristics and girls' race/ethnicity. Sixteen percent of girls were classified as early maturers (defined by onset of menarche before age 11 years). Overall, relational and nonphysical aggression increased from age 11 to age 16, whereas delinquency and physical aggression remained stable. Early puberty was associated with elevated delinquency and physical aggression at age 11. The relationship with early puberty diminished over time for physical aggression but not for delinquency. Best friend's deviant behavior was linked with higher levels of all problem behaviors, but the effect lessened over time for most outcomes. Early puberty was associated with a stronger link between best friend's deviance and delinquency, suggesting increased vulnerability to negative peer influences among early-maturing girls. A similar vulnerability was observed for relational and nonphysical aggression among girls in the "other" racial/ethnic minority group only. Early puberty and friends' deviance may increase the risk of problem behavior in young adolescent girls. Although many of these associations dissipate over time, early-maturing girls are at risk of persistently higher delinquency and stronger negative peer influences.

  9. Puberty Health Status among Adolescent Girls: A Model- based Educational Program

    Directory of Open Access Journals (Sweden)

    Fatemeh Kheirollahi

    2017-07-01

    Full Text Available Background Adolescence is the period of transition from childhood to adulthood and is one of the fastest stages of human development which is simultaneous to start of puberty. This study aimed to investigate the puberty health status among adolescent girls through a model- based educational program. Materials and Methods The current study was an interventional quasi-experimental research. It was conducted on 152 girls aged 13 to 15 years old on the city of Qom- Iran. To select the subjects, first an education zone was randomly selected. In that zone, two schools were randomly selected as the intervention and control groups (76 for interventional group and 76 for control group.After confirming the reliability and validity of a researcher-made questionnaire, it was used to collect the required data via self-reports. Data were analyzed using SPSS version 20.0 software. Results The mean age and menarche of the students were 13.59 ± 0.87 and 12.38 ± 0.99 years, respectively. There was a statistically significant difference between the mean scores of knowledge and behavior in intervention and control groups after educational intervention, so that the mean scores of knowledge and behavior about puberty health in the intervention group were higher than the control group (P 0.05. Conclusion As the results showed, before the intervention the status of knowledge, attitude toward puberty health, and behavior about puberty health of the studied students was not favorable. Therefore, it is necessary to highlight the need for educational interventions and the role of health professionals in this field.

  10. Puberty as a critical risk period for eating disorders: a review of human and animal studies.

    Science.gov (United States)

    Klump, Kelly L

    2013-07-01

    This article is part of a Special Issue "Puberty and Adolescence". Puberty is one of the most frequently discussed risk periods for the development of eating disorders. Prevailing theories propose environmentally mediated sources of risk arising from the psychosocial effects (e.g., increased body dissatisfaction, decreased self-esteem) of pubertal development in girls. However, recent research highlights the potential role of ovarian hormones in phenotypic and genetic risk for eating disorders during puberty. The goal of this paper is to review data from human and animal studies in support of puberty as a critical risk period for eating disorders and evaluate the evidence for hormonal contributions. Data are consistent in suggesting that both pubertal status and pubertal timing significantly impact risk for most eating disorders in girls, such that advanced pubertal development and early pubertal timing are associated with increased rates of eating disorders and their symptoms in both cross-sectional and longitudinal research. Findings in boys have been much less consistent and suggest a smaller role for puberty in risk for eating disorders in boys. Twin and animal studies indicate that at least part of the female-specific risk is due to genetic factors associated with estrogen activation at puberty. In conclusion, data thus far support a role for puberty in risk for eating disorders and highlight the need for additional human and animal studies of hormonal and genetic risk for eating disorders during puberty. Copyright © 2013 Elsevier Inc. All rights reserved.

  11. Data from: Acquired versus innate prey capturing skills in super-precocial live-bearing fish

    NARCIS (Netherlands)

    Lankheet, M.J.M.; Stoffers, Twan; Leeuwen, van J.L.; Pollux, B.J.A.

    2016-01-01

    Live-bearing fish start hunting for mobile prey within hours after birth, an example of extreme precociality. Because prenatal, in utero, development of this behaviour is constrained by the lack of free-swimming sensory-motor interactions, immediate success after birth depends on innate,

  12. Spring Chinook Salmon Interactions Indices and Residual/Precocial Monitoring in the Upper Yakima Basin, Annual Report 1998

    International Nuclear Information System (INIS)

    James, Brenda B.; Pearsons, Todd N.; McMichael, Geoffrey A.

    1999-01-01

    Select ecological interactions and spring chinook salmon residual/precocial abundance were monitored in 1998 as part of the Yakima/Klickitat Fisheries Project's supplementation monitoring program. Monitoring these variables is part of an effort to help evaluate the factors that contribute to, or limit supplementation success. The ecological interactions that were monitored were prey consumption, competition for food, and competition for space. The abundance of spring chinook salmon life-history forms that have the potential to be influenced by supplementation and that have important ecological and genetic roles were monitored (residuals and precocials). Residual spring chinook salmon do not migrate to the ocean during the normal emigration period and continue to rear in freshwater. Precocials are those salmon that precocially mature in freshwater. The purpose of sampling during 1998 was to collect baseline data one year prior to the release of hatchery spring chinook salmon which occurred during the spring of 1999. All sampling that the authors report on here was conducted in upper Yakima River during summer and fall 1998. The stomach fullness of juvenile spring chinook salmon during the summer and fall averaged 12%. The food competition index suggested that mountain whitefish (0.59), rainbow trout (0.55), and redside shiner (0.55) were competing for food with spring chinook salmon. The space competition index suggested that rainbow trout (0.31) and redside shiner (0.39) were competing for space with spring chinook salmon but mountain whitefish (0.05) were not. Age-0 spring chinook salmon selected a fairly narrow range of microhabitat parameters in the summer and fall relative to what was available. Mean focal depths and velocities for age 0 spring chinook salmon during the summer were 0.5 m ± 0.2 m and 0.26 m/s ± 0.19 m/s, and during the fall 0.5 m ± 0.2 m and 0.24 m/s ± 0.18 m/s. Among potential competitors, age 1+ rainbow trout exhibited the greatest degree

  13. Intervention levels in a precocious detection program for breast cancer and evaluation of four participant units

    International Nuclear Information System (INIS)

    Carrera M, F.; Velazquez M, S.; Manzano M, F.J.; Sanchez S, J.

    1998-01-01

    It is presented the basis to make a cost benefit analysis for a breast cancer precocious detection program and consequently the keys for its optimization from the radiological point of view. Taking this as a reference it is made an exhaustive quality control to four mammographic unities which were participating or they were candidates to participate in a breast cancer precocious detection program. Also it is presented its results. It is followed the protocol for quality control in mammography in Spain obtaining values for the measurement of twelve interesting parameters. It should be maintained the standard breast dose about 1 mGy/ image. It should be available a 24 x 30 cm portacassete and considering the utilization of a single projection by breast. (Author)

  14. The relationship between obesity and body compositions with respect to the timing of puberty in Chongqing adolescents: a cross-sectional study.

    Science.gov (United States)

    He, Fang; Guan, Peiyu; Liu, Qin; Crabtree, Donna; Peng, Linli; Wang, Hong

    2017-08-18

    It is well known that excess adiposity during childhood may influence pubertal development. However, the extent to which body compositions vary in throughout puberty in boys and girls is currently unknown. The aim of this study was to investigate whether obesity and body compositions correlate with the timing of puberty in boys and girls. By random cluster sampling, our study analyzed data from 1472 students (690 girls, 782 boys) aged 6-17 years from two schools in the Chongqing area. Data were collected by physical examination of weight, height, and skinfold thicknesses. Testicular volume was measured in boys and breast development in girls. By which we got the indicators of obesity, timing of puberty and body compositions. Probit regression analysis was used to group subjects into early puberty (>P 25 ), on-time puberty (P 25  ~ P 75 ), and delayed puberty (puberty groups by sex. Multivariate analysis of covariance was used to examine the association between timing of puberty and body composition indicators. There were significant differences in the distribution of fat levels (normal weigh, overweight, obesity) among different pubertal groups in different sex (boys:χ2 = 10.639, P = 0.031; girls:χ2 = 63.232, P = 0.000). Multivariate analysis of covariance showed that percentage of body fat, fat mass and fat-free mass in the delayed puberty girls were significantly lower than the girls in the on-time puberty and early puberty, while body density had the opposite result (all P puberty groups (all P > 0.05). In girls, delayed puberty was negatively correlated with Obesity, percentage of body fat, fat mass and fat-free mass, and positively correlated with body density. But in boys, delayed puberty was only negatively correlated with Obesity, the relation between puberty and body compositions was not found.

  15. The Role of Mother in Informing Girls About Puberty: A Meta-Analysis Study

    Science.gov (United States)

    Sooki, Zahra; Shariati, Mohammad; Chaman, Reza; Khosravi, Ahmad; Effatpanah, Mohammad; Keramat, Afsaneh

    2016-01-01

    Context Family, especially the mother, has the most important role in the education, transformation of information, and health behaviors of girls in order for them to have a healthy transition from the critical stage of puberty, but there are different views in this regard. Objectives Considering the various findings about the source of information about puberty, a meta-analysis study was conducted to investigate the extent of the mother’s role in informing girls about puberty. Data Sources This meta-analysis study was based on English articles published from 2000 to February 2015 in the Scopus, PubMed, and Science direct databases and on Persian articles in the SID, Magiran, and Iran Medex databases with determined key words and their MeSH equivalent. Study Selection Quantitative cross-sectional articles were extracted by two independent researchers and finally 46 articles were selected based on inclusion criteria. STROBE list were used for evaluation of studies. Data Extraction The percent of mothers as the current and preferred source of gaining information about the process of puberty, menarche, and menstruation from the perspective of adolescent girls was extracted from the articles. The results of studies were analyzed using meta-analysis (random effects model) and the studies’ heterogeneity was analyzed using the I2 calculation index. Variance between studies was analyzed using tau squared (Tau2) and review manager 5 software. Results The results showed that, from the perspective of teenage girls in Iran and other countries, in 56% of cases, the mother was the current source of information about the process of puberty, menarche, and menstruation. The preferred source of information about the process of puberty, menarche, and menstruation was the mother in all studies at 60% (Iran 57%, and other countries 66%). Conclusions According to the findings of this study, it is essential that health professionals and officials of the ministry of health train

  16. Public health implications of altered puberty timing

    DEFF Research Database (Denmark)

    Golub, M.S.; Collman, G.W.; Foster, P.M.

    2008-01-01

    for chemicals. Recent US legislation has mandated improved chemical testing approaches for protecting children's health and screening for endocrine-disrupting agents, which has led to changes in the US Environmental Protection Agency's risk assessment and toxicity testing guidelines to include puberty...

  17. Puberty as a Critical Risk Period for Eating Disorders: A Review of Human and Animal Studies

    Science.gov (United States)

    Klump, Kelly L.

    2013-01-01

    Puberty is one of the most frequently discussed risk periods for the development of eating disorders. Prevailing theories propose environmentally mediated sources of risk arising from the psychosocial effects (e.g., increased body dissatisfaction, decreased self-esteem) of pubertal development in girls. However, recent research highlights the potential role of ovarian hormones in phenotypic and genetic risk for eating disorders during puberty. The goal of this paper is to review data from human and animal studies in support of puberty as a critical risk period for eating disorders and evaluate the evidence for hormonal contributions. Data are consistent in suggesting that both pubertal status and pubertal timing significantly impact risk for most eating disorders in girls, such that advanced pubertal development and early pubertal timing are associated with increased rates of eating disorders and their symptoms in both cross-sectional and longitudinal research. Findings in boys have been much less consistent and suggest a smaller role for puberty in risk for eating disorders in boys. Twin and animal studies indicate that at least part of the female-specific risk is due to genetic factors associated with estrogen activation at puberty. In conclusion, data thus far support a role for puberty in risk for eating disorders and highlight the need for additional human and animal studies of hormonal and genetic risk for eating disorders during puberty. PMID:23998681

  18. Subfoveal Choroidal Thickness in 1323 Children Aged 11 to 12 Years and Association With Puberty

    DEFF Research Database (Denmark)

    Li, Xiao Qiang; Jeppesen, Pia; Larsen, Michael

    2014-01-01

    .0001). There was no effect of height or puberty in boys, who were less sexually mature than girls. CONCLUSIONS: Choroidal thickness in girls increased with body height and sexual maturation. The results suggest that puberty promotes choroidal thickening in girls, an effect that may be mediated by the pubertal growth spurt....... The lack of pubertal effect in boys may be related to a smaller proportion of boys in this study having entered puberty....

  19. Cytotoxic endocrinopathy: a legacy of insults

    Energy Technology Data Exchange (ETDEWEB)

    Shalet, S.M. [Christie Hospital and Holt Radium Inst., Manchester (United Kingdom)

    1997-04-01

    A review is given of the types of endocrine function impairment observed in patients having received radiotherapy or chemotherapy in cancer treatment. These include anterior pituitary hormone deficiencies as a result of external radiotherapy to the hypothalamopituitary axis, thyroid cancer, thyroid dysfunction, hyperparathyroidism, precocious puberty, and radiation-induced and chemotherapy-induced gonadal damage. (UK).

  20. A novel splice mutation in the TP53 gene associated with Leydig cell tumor and primitive neuroectodermal tumor

    DEFF Research Database (Denmark)

    Stecher, Chalotte Willemann; Grønbaek, Kirsten; Hasle, Henrik

    2008-01-01

    A 20-month-old boy presented with precocious puberty due to a Leydig cell tumor, and at the age of 6 years with a primitive neuroectodermal brain-tumor (PNET). A novel splice site mutation of the TP53-gene, likely to be associated with a nonfunctional protein, was found in the proband, his father...

  1. Cytotoxic endocrinopathy: a legacy of insults

    International Nuclear Information System (INIS)

    Shalet, S.M.

    1997-01-01

    A review is given of the types of endocrine function impairment observed in patients having received radiotherapy or chemotherapy in cancer treatment. These include anterior pituitary hormone deficiencies as a result of external radiotherapy to the hypothalamopituitary axis, thyroid cancer, thyroid dysfunction, hyperparathyroidism, precocious puberty, and radiation-induced and chemotherapy-induced gonadal damage. (UK)

  2. The importance of puberty for adolescent development: conceptualization and measurement.

    Science.gov (United States)

    Berenbaum, Sheri A; Beltz, Adriene M; Corley, Robin

    2015-01-01

    How and why are teenagers different from children and adults? A key question concerns the ways in which pubertal development shapes psychological changes in adolescence directly through changes to the brain and indirectly through the social environment. Empirical work linking pubertal development to adolescent psychological function draws from several different perspectives, often with varying approaches and a focus on different outcomes and mechanisms. The main themes concern effects of atypical pubertal timing on behavior problems during adolescence, effects of pubertal status (and associated hormones) on normative changes in behaviors that can facilitate or hinder development (especially risk-taking, social reorientation, and stress responsivity), and the role of puberty in triggering psychopathology in vulnerable individuals. There is also interest in understanding the ways in which changes in the brain reflect pubertal processes and underlie psychological development in adolescence. In this chapter, we consider the ways that puberty might affect adolescent psychological development, and why this is of importance to developmentalists. We describe the processes of pubertal development; summarize what is known about pubertal influences on adolescent development; consider the assumptions that underlie most work and the methodological issues that affect the interpretation of results; and propose research directions to help understand paths from puberty to behavior. Throughout, we emphasize the importance of pubertal change in all aspects of psychological development, and the ways in which puberty represents an opportunity to study the interplay of biological and social influences. © 2015 Elsevier Inc. All rights reserved.

  3. Testicular Growth During Puberty in Boys With and Without a History of Congenital Cryptorchidism

    DEFF Research Database (Denmark)

    Sadov, Sergey; Koskenniemi, Jaakko J; Virtanen, Helena E

    2016-01-01

    CONTEXT: The pattern of testicular growth during puberty may provide important information about early testicular damage and reproductive potential in adulthood. OBJECTIVE: To evaluate pubertal testicular growth in boys with congenital cryptorchidism and controls. DESIGN: Longitudinal case...... mL by orchidometer and 25 mm by ruler as cut-offs in definition of the onset of puberty. An orchidometer size of 3 mL and ruler length of 25 mm corresponded to 1.6 and 1.7 mL by ultrasound (with Lambert's formula), respectively. CONCLUSIONS: Testicular growth in puberty was impaired in congenitally...

  4. Gigantism treated by pure endoscopic endonasal approach in a case of McCune-Albright syndrome with sphenoid fibrous dysplasia: a case report.

    Science.gov (United States)

    Sharifi, Guive; Jalessi, Maryam; Sarvghadi, Farzaneh; Farhadi, Mohammad

    2013-12-01

    McCune-Albright syndrome (MAS) is an uncommon polyostotic manifestation of fibrous dysplasia in association with at least one endocrinopathy that is mostly associated with precocious puberty and hyperpigmented skin macules named café-au-lait spots. We present an atypical manifestation of McCune-Albright syndrome in a 19-year-old man with the uncommon association of polyostotic fibrous dysplasia and gigantism in the absence of café-au-lait spots and precocious puberty. He presented with a height increase to 202 cm in the previous 3 years, which had become more progressive in the few months prior. Physical examination revealed only a mild facial asymmetry; however, a computed tomography (CT) scan discovered vast areas of voluminous bones with ground-glass density and thickening involving the craniofacial bones and skull base. Magnetic resonance imaging (MRI) found a right stalk shift of the pituitary with a 20 mm pituitary adenoma. We describe the diagnostic and endoscopic endonasal transsphenoidal approach for excision of the tumor. Georg Thieme Verlag KG Stuttgart · New York.

  5. Psychological Support, Puberty Suppression, and Psychosocial Functioning in Adolescents with Gender Dysphoria.

    Science.gov (United States)

    Costa, Rosalia; Dunsford, Michael; Skagerberg, Elin; Holt, Victoria; Carmichael, Polly; Colizzi, Marco

    2015-11-01

    Puberty suppression by gonadotropin-releasing hormone analogs (GnRHa) is prescribed to relieve the distress associated with pubertal development in adolescents with gender dysphoria (GD) and thereby to provide space for further exploration. However, there are limited longitudinal studies on puberty suppression outcome in GD. Also, studies on the effects of psychological support on its own on GD adolescents' well-being have not been reported. This study aimed to assess GD adolescents' global functioning after psychological support and puberty suppression. Two hundred one GD adolescents were included in this study. In a longitudinal design we evaluated adolescents' global functioning every 6 months from the first visit. All adolescents completed the Utrecht Gender Dysphoria Scale (UGDS), a self-report measure of GD-related discomfort. We used the Children's Global Assessment Scale (CGAS) to assess the psychosocial functioning of adolescents. At baseline, GD adolescents showed poor functioning with a CGAS mean score of 57.7 ± 12.3. GD adolescents' global functioning improved significantly after 6 months of psychological support (CGAS mean score: 60.7 ± 12.5; P puberty suppression had significantly better psychosocial functioning after 12 months of GnRHa (67.4 ± 13.9) compared with when they had received only psychological support (60.9 ± 12.2, P = 0.001). Psychological support and puberty suppression were both associated with an improved global psychosocial functioning in GD adolescents. Both these interventions may be considered effective in the clinical management of psychosocial functioning difficulties in GD adolescents. © 2015 International Society for Sexual Medicine.

  6. Puberty in the Girl Who is Retarded.

    Science.gov (United States)

    Pattullo, Ann

    Designed to help mothers of mentally retarded girls deal with the problems and concerns of puberty, the booklet provides information on physical and emotional changes, menstruation, masturbation, heterosexual behavior, contraception, protection against sexual aggression, the possibilities of marriage, and additional sources of information.…

  7. Multi-tissue omics analyses reveal molecular regulatory networks for puberty in composite beef cattle

    Science.gov (United States)

    Puberty is a complex physiological event by which animals mature into an adult capable of sexual reproduction. In order to enhance our understanding of the genes and regulatory pathways and networks involved in puberty, we characterized the transcriptome of five reproductive tissues (i.e., hypothal...

  8. CHARACTERIZATION OF SPONTANEOUS AND INDUCED PUBERTY IN GIRLS WITH TURNER SYNDROME.

    Science.gov (United States)

    Folsom, Lisal J; Slaven, James E; Nabhan, Zeina M; Eugster, Erica A

    2017-07-01

    To characterize puberty in girls with Turner syndrome (TS) and determine whether specific patient characteristics are associated with the timing of menarche. We also sought to compare spontaneous versus induced puberty in these patients. Medical records of girls followed in our Pediatric Endocrine clinic for TS from 2007 to 2015 were reviewed. Fifty-three girls were included, of whom 10 (19%) achieved menarche spontaneously and 43 (81%) received hormone replacement therapy (HRT). Of girls receiving HRT, a younger age at estrogen initiation correlated with a longer time to menarche (P = .02), and a mosaic karyotype was associated with a shorter time to menarche (P = .02), whereas no relationship was seen for body mass index, estrogen regimen, or maternal age at menarche. Nineteen girls (44%) receiving HRT had bleeding on estrogen alone at a wide dose range and were more likely to be on transdermal than oral preparations (P = .01). Girls with spontaneous puberty achieved menarche at a younger age (PTurner syndrome.

  9. Puberty and the manifestations of loss of control eating in children and adolescents.

    Science.gov (United States)

    Vannucci, Anna; Tanofsky-Kraff, Marian; Ranzenhofer, Lisa M; Kelly, Nichole R; Hannallah, Louise M; Pickworth, C Katie; Grygorenko, Mariya V; Brady, Sheila M; Condarco, Tania A; Kozlosky, Merel; Demidowich, Andrew P; Yanovski, Susan Z; Shomaker, Lauren B; Yanovski, Jack A

    2014-11-01

    We investigated the manifestations of pediatric loss of control (LOC) eating at different stages of pubertal development. Participants were a nonclinical sample of 468 youth (8-17 years). Physical examination determined pubertal stage. LOC eating and disordered eating attitudes were assessed with the Eating Disorder Examination. In a randomized crossover design, a subset (n = 244) ate ad libitum from two test meals designed to capture normal and LOC eating. There were no differences in the prevalence rates or frequency of reported LOC eating episodes across pubertal stages (ps ≥ 0.50). There were, however, puberty by LOC eating interactions in disordered eating attitudes and palatable food consumption (ps ≤ .05), even after adjusting for age and body composition. LOC eating was associated with elevated global disordered eating attitudes, weight concern, and shape concern in post-pubertal youth (ps ≤ .001), but not pre-pubertal youth (ps ≥ .49). In late-puberty, youth with LOC eating consumed less energy from protein (p puberty was not associated with differences in eating behavior (ps ≥ 0.20). Findings suggest that puberty may be a critical risk period, when LOC eating behaviors in boys and girls may become accompanied by greater weight and shape concerns and more obesogenic food consumption patterns. Interventions for LOC eating during pre-puberty should be evaluated to determine if they are particularly beneficial for the prevention of exacerbated eating disorder psychopathology and adverse weight outcomes. © 2014 Wiley Periodicals, Inc.

  10. Association between Obesity and Puberty Timing: A Systematic Review and Meta-Analysis.

    Science.gov (United States)

    Li, Wenyan; Liu, Qin; Deng, Xu; Chen, Yiwen; Liu, Shudan; Story, Mary

    2017-10-24

    This systematic review and meta-analysis examined the associations between obesity and puberty timing based on scientific evidence. Eight electronic databases were searched up to February 2017 for eligible studies, and two reviewers screened the articles and extracted the data independently. A total of 11 cohort studies with 4841 subjects met the inclusion criteria. Compared with the group of normal-weight girls, the obese group had more girls with menarche (RR: 1.87, 95% CI: 1.59-2.19, 2 studies). The number of girls with early puberty was significantly higher in the obese group than the normal weight group (RR: 2.44, 95% CI: 1.32-4.52, 5 studies). However, no differences were detected between girls who were obese or normal weight at age of menarche (WMD: -0.53 years, 95% CI: -1.24-0.19, 2 studies). There is no consistent result in the relationship between obesity and timing of pubertal onset in boys. Obesity may contribute to early onset of puberty in girls, while in boys, there is insufficient data. Given the limited number of cohort studies included in this meta-analysis, high-quality studies with strong markers of puberty onset, as well as standardized criteria for defining obesity are needed.

  11. Bone Density and Timing of Puberty in a Longitudinal Study of Girls.

    Science.gov (United States)

    Cattran, Ashley M; Kalkwarf, Heidi J; Pinney, Susan M; Huang, Bin; Biro, Frank M

    2015-06-01

    Primary: To examine the relationship between relative timing of puberty with bone mineral density (BMD) in a group of adolescent girls; Secondary: To determine if family history of breast cancer was associated with bone mineral density. Longitudinal study of girls recruited between 6 and 7 years of age seen every 6 months for 5 years, and subsequently seen annually. BMD of the lumbar spine was measured by dual-energy X-ray absorptiometry (DXA) at mean age of 12.5 years; age- and race-specific Z-scores (BMDz) were calculated. Age of pubertal onset was determined by the first occurrence of breast stage 2, and participants were categorized into race-specific early, on-time and late puberty onset groups. BMDz by timing of pubertal onset, and by family history of breast cancer. DXA scans were performed on 227 study participants, and a second scan was performed on 114 participants 2 years later. Age of onset of puberty was inversely correlated with BMDz, r = -0.31 (P puberty was associated with higher BMD. The high shared variance of BMD and timing of pubertal onset implies an underlying biologic basis. Copyright © 2015 North American Society for Pediatric and Adolescent Gynecology. Published by Elsevier Inc. All rights reserved.

  12. Association between Obesity and Puberty Timing: A Systematic Review and Meta-Analysis

    Directory of Open Access Journals (Sweden)

    Wenyan Li

    2017-10-01

    Full Text Available This systematic review and meta-analysis examined the associations between obesity and puberty timing based on scientific evidence. Eight electronic databases were searched up to February 2017 for eligible studies, and two reviewers screened the articles and extracted the data independently. A total of 11 cohort studies with 4841 subjects met the inclusion criteria. Compared with the group of normal-weight girls, the obese group had more girls with menarche (RR: 1.87, 95% CI: 1.59–2.19, 2 studies. The number of girls with early puberty was significantly higher in the obese group than the normal weight group (RR: 2.44, 95% CI: 1.32–4.52, 5 studies. However, no differences were detected between girls who were obese or normal weight at age of menarche (WMD: −0.53 years, 95% CI: −1.24–0.19, 2 studies. There is no consistent result in the relationship between obesity and timing of pubertal onset in boys. Obesity may contribute to early onset of puberty in girls, while in boys, there is insufficient data. Given the limited number of cohort studies included in this meta-analysis, high-quality studies with strong markers of puberty onset, as well as standardized criteria for defining obesity are needed.

  13. Assessment of High Rates of Precocious Male Maturation in a Spring Chinook Salmon Supplementation Hatchery Program, Annual Report 2002-2003.

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, Donald; Beckman, Brian; Cooper, Kathleen

    2003-08-01

    The Yakima River Spring Chinook Salmon Supplementation Project in Washington State is currently one of the most ambitious efforts to enhance a natural salmon population in the United States. Over the past five years we have conducted research to characterize the developmental physiology of naturally- and hatchery-reared wild progeny spring chinook salmon (Oncorhynchus tshawytscha) in the Yakima River basin. Fish were sampled at the main hatchery in Cle Elum, at remote acclimation sites and, during smolt migration, at downstream dams. Throughout these studies the maturational state of all fish was characterized using combinations of visual and histological analysis of testes, gonadosomatic index (GSI), and measurement of plasma 11-ketotestosterone (11-KT). We established that a plasma 11-KT threshold of 0.8 ng/ml could be used to designate male fish as either immature or precociously maturing approximately 8 months prior to final maturation (1-2 months prior to release as 'smolts'). Our analyses revealed that 37-49% of the hatchery-reared males from this program undergo precocious maturation at 2 years of age and a proportion of these fish appear to residualize in the upper Yakima River basin throughout the summer. An unnaturally high incidence of precocious male maturation may result in loss of potential returning anadromous adults, skewing of female: male sex ratios, ecological, and genetic impacts on wild populations and other native species. Precocious male maturation is significantly influenced by growth rate at specific times of year and future studies will be conducted to alter maturation rates through seasonal growth rate manipulations.

  14. Gender differences in asthma development and remission during transition through puberty : The TRacking Adolescents' Individual Lives Survey (TRAILS) study

    NARCIS (Netherlands)

    Vink, Nienke M; Postma, Dirkje S; Schouten, Jan P; Rosmalen, Judith G M; Boezen, Hendrika

    BACKGROUND: During puberty, a gender shift in asthma prevalence occurs, with a preponderance of boys before puberty. The mechanisms underlying this gender shift are unclear. OBJECTIVES: We assessed associations of pubertal stages and transition through puberty with (1) the prevalence, incidence, and

  15. Psychological Support, Puberty Suppression, and Psychosocial Functioning in Adolescents with Gender Dysphoria

    OpenAIRE

    Costa, Rosalia; Dunsford, Michael; Skagerberg, Elin; Holt, Victoria; Carmichael, Polly; Colizzi, Marco

    2015-01-01

    INTRODUCTION: Puberty suppression by gonadotropin-releasing hormone analogs (GnRHa) is prescribed to relieve the distress associated with pubertal development in adolescents with gender dysphoria (GD) and thereby to provide space for further exploration. However, there are limited longitudinal studies on puberty suppression outcome in GD. Also, studies on the effects of psychological support on its own on GD adolescents' well-being have not been reported.AIM: This study aimed to assess GD ado...

  16. Study Of Morphological Changes Of Uterine Horn Of Surri Mouse Depended To Morphine Before Puberty And DuringPuberty

    Directory of Open Access Journals (Sweden)

    Shadkhast M

    2003-11-01

    Full Text Available : Morphine is the most important alkaloid of opium family which is found as much as ten percent in opium, and is in two types the sulfate morphine and the hydrochloride morphine."nMaterials and Methods: In this study morphological changes of uterus of surri mice due to oral consumption of sulfate morphine were studied. It was shown that, female surri mice following gradually increasing of morphine to water (0.1 and 0.01 mg/ml were depended to morphine. Female surri mice were classified in two age groups before puberty and depended to morphine during puberty. Each age group took morphine for 21 days. After finishing the period, the mice anesthetizing were weighted, then were anesthetizing and uterus was studied the length, width and apparent features."nResults&ConcIusion: In this study it was distinguished that length and width of uterine horn, between experimental and control groups, were significant (P< 0.01. Morphological changes such as anemia, the thinness and fragitidily walls of uterus and filiformity of uterine horns were observed."n"n"n"n"n"n 

  17. The effect of puberty on fat oxidation rates during exercise in overweight and normal-weight girls.

    Science.gov (United States)

    Chu, L; Riddell, M C; Schneiderman, J E; McCrindle, B W; Hamilton, J K

    2014-01-01

    Excess weight is often associated with insulin resistance (IR) and may disrupt fat oxidation during exercise. This effect is further modified by puberty. While studies have shown that maximal fat oxidation rates (FOR) during exercise decrease with puberty in normal-weight (NW) and overweight (OW) boys, the effect of puberty in NW and OW girls is unclear. Thirty-three NW and OW girls ages 8-18 yr old completed a peak aerobic capacity test on a cycle ergometer. FOR were calculated during progressive submaximal exercise. Body composition and Tanner stage were determined. For each participant, a best-fit polynomial curve was constructed using fat oxidation vs. exercise intensity to estimate max FOR. In a subset of the girls, IR derived from an oral glucose tolerance test (n = 20), and leptin and adiponectin levels (n = 11) were assessed in relation to FOR. NW pre-early pubertal girls had higher max FOR [6.9 ± 1.4 mg·kg fat free mass (FFM)(-1)·min(-1)] than NW mid-late pubertal girls (2.2 ± 0.9 mg·kg FFM(-1)·min(-1)) (P = 0.002), OW pre-early pubertal girls (3.8 ± 2.1 mg·kg FFM(-1)·min(-1)), and OW mid-late pubertal girls (3.3 ± 0.9 mg·kg FFM(-1)·min(-1)) (P puberty; however, this decrease associated with puberty was blunted in OW girls due to lower FOR in pre-early puberty. The presence of IR due to obesity potentially masks the effect of puberty on FOR during exercise in girls.

  18. Endocrine studies in ivermectin-treated heifers from birth to puberty.

    Science.gov (United States)

    Lacau-Mengido, I M; Mejía, M E; Díaz-Torga, G S; Gonzalez Iglesias, A; Formía, N; Libertun, C; Becú-Villalobos, D

    2000-04-01

    Continuous treatment with ivermectin from birth to puberty advanced sexual maturation by 3.7 wk in Holstein heifers grazing pastures naturally infected with nematodes. Every 14 d jugular blood samples were taken from birth to 45 wk of age from all heifers. No differences in serum FSH, estradiol, or thyroxine levels were observed during the trial between the treated and untreated group. Mean LH levels were diminished in untreated heifers 4 wk before the first estrus and the amplitude of LH pulses was augmented in treated heifers when puberty was reached. Serum IGF-I levels increased from birth to 22 wk of age and then reached a plateau in both groups, but levels were consistently higher in treated heifers from 26 wk of age onward. Body weight gain was retarded in parasitized heifers and IGF-I values were positively correlated with body weight only during the first 20 wk of life. We suggest that enhanced prepubertal IGF-I levels in conjunction with increased prepubertal LH levels and pubertal LH pulse amplitude might be involved in the accelerated somatic maturation and in puberty advancement observed in ivermectin-treated heifers.

  19. METHOD OF TREATMENT OF CONSTITUTIONAL PUBERTY RETARDATION IN BOYS (CASE HISTORY

    Directory of Open Access Journals (Sweden)

    A. A. Sinitsina

    2012-01-01

    Full Text Available The results of examination of a 15-year-old boy with growth and puberty retardation are analyzed in this article. On the grounds of performed complex examination the patient was found physical development delay, changes at the endocrinal status, as well as pathological signs on X-ray, rheo- and electroencephalography, which are characteristic for functional growth and puberty retardation. In order to correct the found disturbances transcranial magnetotherapy was carried out. During the performed treatment improvement of the physical development characteristics, endocrinal status and data of rheo- and electroencephalography were noted.

  20. The changes in running economy during puberty in overweight and normal weight boys

    Directory of Open Access Journals (Sweden)

    Maciejczyk Marcin

    2015-03-01

    Full Text Available Study aim: running economy (RE is important indicator of endurance performance. During puberty dynamic changes in body composition and function are observed, as such RE is also expected to change. The aim of the study was to compare the running economy (RE in overweight and normoweight boys during a running exercise performed with constant velocity, and the assessment of changes in RE during puberty.

  1. Hormonal factors and incident asthma and allergic rhinitis during puberty in girls.

    Science.gov (United States)

    Wei, Junxiang; Gerlich, Jessica; Genuneit, Jon; Nowak, Dennis; Vogelberg, Christian; von Mutius, Erika; Radon, Katja

    2015-07-01

    Accumulating evidence is indicating that hormonal factors play a role in new-onset allergic rhinitis and asthma after puberty. To determine whether age at menarche and use of hormonal contraceptives predict new-onset allergic rhinitis and asthma after puberty in young German women. A prospective community-based cohort study followed 1,191 girls 9 to 11 years old to early adulthood (19-24 years old). Self-administrated questionnaires concerning age at menarche, use of hormonal contraceptives, and status and age at onset of physician-diagnosed allergic rhinitis and asthma were collected at 16 to 18 and 19 to 24 years of age. Logistic regression models were used to analyze the incidence of asthma and allergic rhinitis after puberty and pooled estimates were obtained from the final model. Eleven percent of girls developed allergic rhinitis after menarche and 3% reported new-onset asthma. Late menarche (>13 years of age) was statistically significantly inversely related to allergic rhinitis (adjusted odds ratio [OR] 0.32, 95% confidence interval [CI] 0.14-0.74) but did not reach the level of statistical significance for asthma (OR 0.32, 95% CI 0.07-1.42). Use of hormonal contraceptives was inversely associated with new-onset allergic rhinitis (OR 0.14, 95% CI 0.08-0.23) and asthma (OR 0.27, 95% CI 0.12-0.58) after puberty. This study shows that girls with late onset of menarche are less likely to develop allergic rhinitis after puberty compared with those who have menarche at an average age. These findings also suggest that, in addition to endogenous hormones, hormonal contraceptives play a role and might protect young women from allergies and asthma. Copyright © 2015 American College of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.

  2. Chronic leptin infusion advances, and immunoneutralization of leptin postpones puberty onset in normally fed and feed restricted female rats

    NARCIS (Netherlands)

    Zeinoaldini, S.; Swarts, J.J.M.; Heijning, van de B.J.M.

    2006-01-01

    Does leptin play a vital role in initiating puberty in female rats and can it overrule a nutrionally imposed (i.e. a 30% feed restriction, FR) delay in puberty onset? Prepubertal female rats were chronically infused for 14 days with leptin (icv or sc) or leptin-antiserum (icv) while puberty onset

  3. [Deviation in psychosexual development in the pre-puberty children].

    Science.gov (United States)

    Liavshina, G Kh

    2002-01-01

    Psychosexual health of 308 children, aged 2-11 years, as well as that of their families, was studied. Deviations in psychosexual development were found in 34.6% of the children examined. The following types were detected: difficulties in formation of gender-determined behavior features--64.4%, precocious psychosexual development--13.7%, delayed psychosexual development--12.3%, obsessive masturbation--9.6%. Risk factors for deviant psychosexual development were found.

  4. Precocious scaling in antiproton-proton scattering at low energies

    International Nuclear Information System (INIS)

    Ion, D.B.; Petrascu, C.; Topor Pop, V.; Popa, V.

    1993-08-01

    The scaling of the diffraction peak in antiproton-proton scattering has been investigated from nera threshold up to 3 GeV/c laboratory momenta. It was shown that the scaling of the differential cross sections are evidentiated with a surprising accuracy not only at high energies, but also at very low ones (e.g. p LAB = 0.1 - 0.5 GeV/c), beyond the resonance and exotic resonance regions. This precocious scaling strongly suggests that the s-channel helicity conservation (SCHC) can be a peculiar property that should be tested in antiproton-proton interaction not only at high energies but also at low energy even below p LAB = 1 GeV/c. (author). 36 refs, 9 figs

  5. Apparent Transition in the Human Height Distribution Caused by Age-Dependent Variation during Puberty Period

    Science.gov (United States)

    Iwata, Takaki; Yamazaki, Yoshihiro; Kuninaka, Hiroto

    2013-08-01

    In this study, we examine the validity of the transition of the human height distribution from the log-normal distribution to the normal distribution during puberty, as suggested in an earlier study [Kuninaka et al.: J. Phys. Soc. Jpn. 78 (2009) 125001]. Our data analysis reveals that, in late puberty, the variation in height decreases as children grow. Thus, the classification of a height dataset by age at this stage leads us to analyze a mixture of distributions with larger means and smaller variations. This mixture distribution has a negative skewness and is consequently closer to the normal distribution than to the log-normal distribution. The opposite case occurs in early puberty and the mixture distribution is positively skewed, which resembles the log-normal distribution rather than the normal distribution. Thus, this scenario mimics the transition during puberty. Additionally, our scenario is realized through a numerical simulation based on a statistical model. The present study does not support the transition suggested by the earlier study.

  6. The timing of normal puberty and the age limits of sexual precocity

    DEFF Research Database (Denmark)

    Parent, Anne-Simone; Teilmann, Grete; Juul, Anders

    2003-01-01

    During the past decade, possible advancement in timing of puberty has been reported in the United States. In addition, early pubertal development and an increased incidence of sexual precocity have been noticed in children, primarily girls, migrating for foreign adoption in several Western European...... the environment has been considered. These observations urge further study of the onset of puberty as a possible sensitive and early marker of the interactions between environmental conditions and genetic susceptibility that can influence physiological and pathological processes....

  7. What Do Preservice Teachers Want to Learn about Puberty and Sexuality Education? An Australian Perspective

    Science.gov (United States)

    Goldman, Juliette D. G.; Grimbeek, Peter

    2016-01-01

    The processes of puberty are now commonly observed in primary school-aged students. Schools, therefore, need to address puberty and sexuality education for students' health, well-being, safety and pastoral care. Similarly, preservice teacher education needs to address future primary school teachers' unfamiliarity and lack of confidence with these…

  8. A Study To Evaluate The Aetiological Factors And Management of Puberty Menorrhagia

    Directory of Open Access Journals (Sweden)

    Joydeb Roychowdhury

    2008-04-01

    Full Text Available Introduction: This study aims to evaluate the incidence, clinical presentation, etiological factors and treatment outcomes of the patients suffering from puberty menorrhagia. Methods: 65 patients with puberty menorrhagia attending the outpatient as well as indoor department of NRS Medical College, Kolkata during the period from February, 2005 to July,2006 were included in the study. They were prospectively analysed to assess the aetiological factors and the outcome of treatment required to manage these cases.Results – The incidence of puberty menorrhagia was 9.6% in our study. 40%s patients had menarche between 12-13 years. 61.6% had anovulatory dysfunctional uterine bleeding(DUB. 15.4% had hematological causes. Hypothyroidism, endometrial tuberculosis, polycystic ovarian disease were other important causes. 40% were relieved with tranexamic acid, 26% required hormone treatment and 35.3% received blood transfusion.Conclusion: Anovulatory DUB is the cause of menorrhagia in most of the cases .Medical treatment is mostly effective while surgical procedures are limited to few specific cases.

  9. Precocious Degenerative Arthropathy And Bluish Patches On Ears : Ochronosis And Alkaptonuria

    Directory of Open Access Journals (Sweden)

    Mahajan Vikram K

    2004-01-01

    Full Text Available Alkaptonuria is a rare, autosomal recessive disorder of phenylalanin/tyrosine metabolism due to congenital deficiency of the enzyme homogentisic acid oxidase. The diagnosis is clinical and the triad of homogentisic aciduria, ochronosis and precocious degenerative arthritis is characteristic. Its diagnosis in infancy and early therapeutic intervention help delaying its complications. These patients may remain undiagnosed until the darkening of urine soaked diapers is noticed or the early degenerative arthropathy develops. This paper describes two cases of alkaptonuria presenting late in life; one of them had associated hyperthyroidism.

  10. Various endocrine disorders in children with t(13;14(q10;q10 Robertsonian translocation

    Directory of Open Access Journals (Sweden)

    Byung Ho Choi

    2013-09-01

    Full Text Available Purpose45,XY,t(13;14(q10;q10 karyotype can suggest infertility associated with more or less severe oligospermia in male adults. In addition, 45,XX,t(13;14(q10;q10 karyotype carries reproductive risks such as miscarriage or infertility in female adults. However, reports on the phenotype of this karyotype in children are very rare. This study was done to observe various phenotypes of this karyotype in children.MethodsBetween January 2007 and December 2012, children diagnosed with 45,XY,t(13;14(q10;q10 or 45,XX,t(13;14(q10;q10 karyotype by chromosome analysis were analyzed retrospectively.ResultsEight children (5 boys and 3 girls were diagnosed with 45,XY,t(13;14(q10;q10 or 45,XX,t(13;14(q10;q10 karyotype. They ranged in age from 5 years and 6 months to 12 years and 4 months. The phenotypes of the study patients consisted of 1 hypogonadotrophic hypogonadism, 1 precocious puberty, 3 early puberty, 2 growth hormone deficiency (GHD (partial and 1 idiopathic short stature. As shown here t(13;14(q10;q10 Robertsonian translocation shows a wide range of phenotypes.ConclusionIt can be said that t(13;14(q10;q10 Robertsonian translocation shows various phenotypes from GHD to precocious puberty in children. Further large-scale studies are necessary.

  11. High-Throughput Sequencing Reveals Circulating miRNAs as Potential Biomarkers for Measuring Puberty Onset in Chicken (Gallus gallus).

    Science.gov (United States)

    Han, Wei; Zhu, Yunfen; Su, Yijun; Li, Guohui; Qu, Liang; Zhang, Huiyong; Wang, Kehua; Zou, Jianmin; Liu, Honglin

    2016-01-01

    There are still no highly sensitive and unique biomarkers for measurement of puberty onset. Circulating miRNAs have been shown to be promising biomarkers for diagnosis of various diseases. To identify circulating miRNAs that could be served as biomarkers for measuring chicken (Gallus gallus) puberty onset, the Solexa deep sequencing was performed to analyze the miRNA expression profiles in serum and plasma of hens from two different pubertal stages, before puberty onset (BO) and after puberty onset (AO). 197 conserved and 19 novel miRNAs (reads > 10) were identified as serum/plasma-expressed miRNAs in the chicken. The common miRNA amounts and their expression changes from BO to AO between serum and plasma were very similar, indicating the different treatments to generate serum and plasma had quite small influence on the miRNAs. 130 conserved serum-miRNAs were showed to be differentially expressed (reads > 10, P 1.0, P puberty onset. Further quantitative real-time PCR (RT-qPCR) test found that a seven-miRNA panel, including miR-29c, miR-375, miR-215, miR-217, miR-19b, miR-133a and let-7a, had great potentials to serve as novel biomarkers for measuring puberty onset in chicken. Due to highly conserved nature of miRNAs, the findings could provide cues for measurement of puberty onset in other animals as well as humans.

  12. Sex differences in athletic performance emerge coinciding with the onset of male puberty.

    Science.gov (United States)

    Handelsman, David J

    2017-07-01

    Male performance in athletic events begins to exceed that of age-matched females during early adolescence, but the timing of this divergence relative to the onset of male puberty and the rise in circulating testosterone remains poorly defined. This study is a secondary quantitative analysis of four published sources which aimed to define the timing of the gender divergence in athletic performance and relating it to the rise in circulating testosterone due to male puberty. Four data sources reflecting elite swimming and running and jumping track and field events as well as hand-grip strength in nonathletes were analysed to define the age-specific gender differences through adolescence and their relationship to the rising circulating testosterone during male puberty. The onset and tempo of gender divergence were very similar for swimming, running and jumping events as well as the hand-grip strength in nonathletes, and all closely paralleled the rise in circulating testosterone in adolescent boys. The gender divergence in athletic performance begins at the age of 12-13 years and reaches adult plateau in the late teenage years with the timing and tempo closely parallel to the rise in circulating testosterone in boys during puberty. © 2017 John Wiley & Sons Ltd.

  13. McCune-Albright syndrome

    Directory of Open Access Journals (Sweden)

    Collins Michael T

    2008-05-01

    Full Text Available Abstract McCune-Albright syndrome (MAS is classically defined by the clinical triad of fibrous dysplasia of bone (FD, café-au-lait skin spots, and precocious puberty (PP. It is a rare disease with estimated prevalence between 1/100,000 and 1/1,000,000. FD can involve a single or multiple skeletal sites and presents with a limp and/or pain, and, occasionally, a pathologic fracture. Scoliosis is common and may be progressive. In addition to PP (vaginal bleeding or spotting and development of breast tissue in girls, testicular and penile enlargement and precocious sexual behavior in boys, other hyperfunctioning endocrinopathies may be involved including hyperthyroidism, growth hormone excess, Cushing syndrome, and renal phosphate wasting. Café-au-lait spots usually appear in the neonatal period, but it is most often PP or FD that brings the child to medical attention. Renal involvement is seen in approximately 50% of the patients with MAS. The disease results from somatic mutations of the GNAS gene, specifically mutations in the cAMP regulating protein, Gs alpha. The extent of the disease is determined by the proliferation, migration and survival of the cell in which the mutation spontaneously occurs during embryonic development. Diagnosis of MAS is usually established on clinical grounds. Plain radiographs are often sufficient to make the diagnosis of FD and biopsy of FD lesions can confirm the diagnosis. The evaluation of patients with MAS should be guided by knowledge of the spectrum of tissues that may be involved, with specific testing for each. Genetic testing is possible, but is not routinely available. Genetic counseling, however, should be offered. Differential diagnoses include neurofibromatosis, osteofibrous dysplasia, non-ossifying fibromas, idiopathic central precocious puberty, and ovarian neoplasm. Treatment is dictated by the tissues affected, and the extent to which they are affected. Generally, some form of surgical intervention

  14. Everything You Wanted to Know about Puberty (For Teens)

    Science.gov (United States)

    ... it's not a pretty one. That smell is body odor, and everyone gets it. As you enter puberty, ... deodorant with antiperspirant) every day can help keep body odor in check, too. There's More? Guys and girls ...

  15. To treat or not to treat: puberty suppression in childhood-onset gender dysphoria

    OpenAIRE

    Costa, Rosalia; Carmichael, Polly; Colizzi, Marco

    2016-01-01

    Puberty suppression using gonadotropin-releasing-hormone analogues (GnRHa) has become increasingly accepted as an intervention during the early stages of puberty (Tanner stage 2-3) in individuals with clear signs of childhood-onset gender dysphoria. However, lowering the age threshold for using medical intervention for children with gender dysphoria is still a matter of contention, and is more controversial than treating the condition in adolescents and adults, as children with gender dysphor...

  16. McCune-Albright syndrome: growth hormone and prolactin hypersecretion.

    Science.gov (United States)

    Christoforidis, Athanasios; Maniadaki, Ilianna; Stanhope, Richard

    2006-05-01

    McCune-Albright syndrome (MAS) has a special interest for endocrinologists as its pathogenesis results in hypersecretion of hormones in peripheral endocrine tissues. This can be expressed as precocious puberty, mainly in girls, primary hyperthyroidism, growth hormone (GH) and/or prolactin excess, hyperparathyroidism and hypercortisolism. The incidence of GH excess among patients with MAS has been assessed as up to 21%. The pathogenesis of GH hypersecretion in MAS is not completely understood, whereas it seems to be different from the aetiology of acromegaly/gigantism in non-MAS patients. The clinical expression of GH excess can be masked because of precocious puberty or craniofacial fibrous dysplasia, indicating the necessity for screening. Medical treatment is usually the only option in MAS patients with GH excess, as transsphenoidal surgery is usually restricted due to massive thickening of the skull base, whereas radiotherapy is contraindicated due to probable higher predisposition to sarcomatous transformation. The use of bromocriptine, cabergoline and octreotide, or the combination of these, has shown variable results, whereas pegvisomant, a GH receptor antagonist, is a new promising option, although not yet used in patients with MAS.

  17. Precocious germination and its regulation in embryos of triticale caryopses

    Directory of Open Access Journals (Sweden)

    Stanisław Weidner

    2014-01-01

    Full Text Available Triticale var. Lasko embryos, isolated from grain gathered at milk ripeness, the beginning of wax ripeness and at full ripeness, were allowed to germinate for 48 h on agar with glucose. The highest incorporation of tritiated adenosine into polyribosomal RNA during germination was found in the ribosome fractions from embryos of grain gathered at full ripeness, lower incorporation was in preparations from embryos of milk ripe grain and the lowest in preparations from embryos of wax ripe grain. Different tendencies were observed in respect to the synthesis of ribosomal proteins. The highest incorporation of 14C-amino acids into ribosomal proteins was found in preparations of ribosome fractions from embryos of milk ripe grain, lower in preparations of embryos from fully ripe grain, the lowest in preparations of embryos from wax ripe grain. ABA (10-4 M completely inhibited the external symptoms of germination of immature embryos, while its inhibition of the synthesis of polyribosomal RNA and ribosomal proteins was greater the more mature the embryos that were germinated. The greatest stimulation of precocious germination by exogenous BA and GA3 was demonstrated in the least mature embryos isolated from milk ripe grain. Under the influence of both stimulators, an increase of the proportion of polyribosomes in the total ribosome fraction occurred in this sample, as did a rise in the intensity of ribosomal protein synthesis. The incorporation of 3H-adenosine into polyribosomal RNA, however, was lower than in the control sample. The results obtained suggest that the regulation of precocious germination of triticale embryos by phyto-hormones is not directly related to transcription.

  18. Trabalho precoce: realidade social e desafio de política pública Precocious labor: a social reality and a challenge to public policy

    Directory of Open Access Journals (Sweden)

    Sonia Rocha

    2003-01-01

    Full Text Available This article presents the basic characteristics of precocious labor in Brazil in the nineties. Since the age individuals start working does not seem to be an important determinant of future income, we examined its related aspects, such as school attendance and hard work incidence of. As precocious labor still involves large contingents of children in Brazil under quite different working conditions, it is essential to distinguish the most critical situations so as to support a social policy design targeted at a specific clientele.

  19. PC Greyling CH van Niekerk* Most investigators determine puberty ...

    African Journals Online (AJOL)

    progesterone concentrations, cyclic activity for kids weaned in December and April on a high- or ... goats had an effect upon synchronization and timing of puberty, entrained by ... research done on ewe lambs is much more comjJrehensive.

  20. Maternal-fetal communication of circadian phase in a precocious rodent, the spiny mouse

    International Nuclear Information System (INIS)

    Weaver, D.R.; Reppert, S.M.

    1987-01-01

    The development of circadian rhythms was examined in a precocious rodent species, the spiny mouse. Spiny mouse pups born and reared in constant darkness expressed robust circadian rhythms in locomotor activity as early as day 5 of live. Free-running activity rhythms of pups born and reared in constant darkness were coordinated with the dam on the day of birth. Postnatal maternal influences on pup rhythmicity are minimal in this species, as pups fostered on the day of birth to dams whose circadian phases were opposite to the pups' original dams were coordinated with their original dams on the day of birth. Studies using 2-deoxy-D-[1- 14 C]-glucose authoradiography showed that there were synchronous (coordinated) rhythms in metabolic activity in the maternal and fetal suprachiasmatic nuclei, directly demonstrating prenatal coordination of maternal and fetal rhythmicity. Maternal-fetal coordination of circadian phase was not the result of direct entrainment of the fetuses to the environmental light-dark cycle. These results demonstrate that there is prenatal communication of circadian phase in this precocious species, without demonstrable postnatal maternal influences on pup circadian rhythmicity. Spiny mice therefore represent an important animal model in which circadian rhythms in the postnatal period can be used to precisely assess prenatal influences on circadian phase

  1. Temporal dynamics of milk composition of the precocial caviomorph Octodon degus (Rodentia: Octodontidae Dinámica temporal de la composición de la leche del caviomorfo precocial Octodon degus (Rodentia: Octodentidae

    Directory of Open Access Journals (Sweden)

    CLAUDIO VELOSO

    2005-06-01

    Full Text Available During lactation, both the nutritional and energetic requirements of suckling change gradually. These changes normally are accompanied by modifications in chemical composition of the milk. We investigated the temporal course of milk composition during lactation in a precocial caviomorph rodent, the "degu" (Octodon degus under laboratory condition. Female degus were kept in laboratory during gestation and lactation and fed with commercial food pellets. Milk was collected at three stages of lactation: early (days 5-8, n = 12, middle (days 15-21, n = 7 and late (days 26-40, n = 6, and analyzed for protein, carbohydrates, lipids, ash, total solids and energy. On average, carbohydrates decreased from 3.1 ± 0.3 % (early to 1.1 ± 0.3 % (late during lactation; lipids, protein, ash, total solids and energy remained about the same. Lipids, the main component of the milk, were 17.3 % and protein remained near 4.4 %. Over lactation, total energy concentration of milk remained near 4.0 kJ mL-1. The maintenance of milk composition during lactation may be related to the initially high energetic and nutritional requirements associated with a precocial reproductive modeDurante la lactancia, tanto los requerimientos energéticos como nutricionales de las crías cambian gradualmente. Estos cambios normalmente van acompañados por modificaciones en la composición química de la leche. Se investigaron los cambios temporales de la composición de la leche durante la lactancia en el roedor caviomorfo precocial "degu" (Octodon degus bajo condiciones de laboratorio. Las hembras de degu fueron mantenidas en el laboratorio durante preñez y lactancia, y fueron alimentadas con alimento comercial de conejo. La leche fue colectada en tres estados de lactancia: temprana (días 5-8, n = 12, media (días 15-21, n = 7 y tardía (días 26-40, n = 6, y analizadas para proteínas, hidratos de carbono, lípidos, ceniza, sólidos totales y energía. En promedio, los hidratos de

  2. Increase in first morning voided urinary luteinizing hormone levels precedes the physical onset of puberty

    DEFF Research Database (Denmark)

    Demir, Ahmet; Voutilainen, R; Juul, A

    1996-01-01

    Determinations of serum gonadotropin concentrations by ultra-sensitive methods have improved the diagnosis of pubertal disorders. The onset of puberty can be estimated by measuring serum gonadotropin pulsation, but as this requires serial nocturnal blood sampling, it is not a routine investigation...... before clinical signs of puberty can be detected. The correlation between FMV urine and S-LH values was good (r = 0.64; P ... for S-LH. A significant increase in FMV U-LH concentration occurs before the first clinical signs of puberty in a sex-independent fashion. Our data indicate that FMV U-LH measurement is a clinically relevant, noninvasive method for the evaluation of pubertal development, and it may be helpful...

  3. Effect of physical and psychological puberty training on general well being and its dimensions in girl students

    Directory of Open Access Journals (Sweden)

    Shahrban Mehrabi

    2018-03-01

    Full Text Available Transition through puberty is marked by an increased risk for the onset of a range of health problems, particularly those related to the control of behavior and emotion. The aim of this study was to determine the effectiveness of training puberty (physical and psychological matters in general well being and its dimensions in girl adolescents. This was a quasi-experimental study in which the target population included all girl students at the first grade of high school in Jiroft, Iran. 40 students (20 in the experimental group and 20 in the control group was selected using multi stage sampling method. The experimental group was educated in twelve-90- minute sessions. The content of the educational course included physical signs of puberty, physiologic change in menstrual period, hygiene, nutrition, and psychological changes of puberty. The participants completed the Skehill's general well being questionnaire before and after the intervention. Covariance analysis revealed the efficacy of education on the enhancement of psychological well being and psychological distress reduction. Therefore, it is recommended to implement health educational programs about physical and psychological matters during puberty to elementary and secondary school students to improve their mental health

  4. Stephen C. Woods: a precocious scientist.

    Science.gov (United States)

    Smith, Gerard P

    2011-04-18

    To investigate the early scientific development of Steve Woods, I reviewed his research during the first decade after he received his doctoral degree in 1970. The main parts of his research program were conditioned insulin secretion and hypoglycemia, Pavlovian conditioning of insulin secretion before a scheduled access to food, and basal insulin as a negative-feedback signal from fat mass to the brain. These topics were pursued with experimental ingenuity; the resulting publications were interesting, clear, and rhetorically effective. Although the theoretical framework for his experiments with insulin was homeostatic, by the end of the decade he suggested that classic negative-feedback homeostasis needed to be revised to include learning acquired by lifestyle. Thus, Woods functioned as a mature scientist from the beginning of his research-he was very precocious. This precocity also characterized his teaching and mentoring as recalled by two of his students during that time, Joseph Vasselli and Paul Kulkosky. The most unusual and exemplary aspect of his precocity is that the outstanding performance of his first decade was maintained during the subsequent 30years. Copyright © 2011 Elsevier Inc. All rights reserved.

  5. The roles of age at puberty and energy restriction in sow reproductive longevity: a genomic perspective

    Science.gov (United States)

    Approximately 50% of sows are culled annually with more than one third due to poor fertility. Our research demonstrated that age at puberty is an early pre-breeding indicator of reproductive longevity. Age at puberty can be measured early in life, has a moderate heritability and is negatively correl...

  6. Is puberty a risk factor for back pain in the young? a systematic critical literature review

    DEFF Research Database (Denmark)

    Lardon, A.; Leboeuf-Yde, C.; Le Scanff, C.

    2014-01-01

    the increasing stages of puberty and the subsequent prevalence of back pain? 4) Is there a temporal link between puberty and back pain? DESIGN: A systematic critical literature review. METHODS: Systematic searches were made in March 2014 in PubMed, Embase, CINAHL and PsycINFO including longitudinal or cross...

  7. Environmental factors and puberty timing: Expert panel research needs

    Science.gov (United States)

    An expert panel reviewed the literature on endocrine disrupting chemicals (EDCs), body size and puberty. The panel concluded that available experimental animal and human data support a possible role of EDCs and body size in relation to alterations in pubertal onset and progressio...

  8. Age and body weight of Moroccan local cattle at puberty: Effect of season

    International Nuclear Information System (INIS)

    Mazouz, A.; Asri, A.

    1988-01-01

    Moroccan local cattle are a distinct breed comprising almost 90% of the total cattle population of 2.5 million. The age and the body weight of some 1662 heifers attaining puberty were determined under two production systems by monitoring plasma progesterone levels as an indicator of the first ovulation. The effect of season on these parameters was also studied. Ovarian cyclicity commenced in 50% of heifers by the age of 16.5 months and at a body weight of 144 kg (70% of the mature body weight). The time of puberty was correlated with both age and body weight and was influenced by both the season of the year at which puberty was reached and the system of rearing. The mean age at which behavioural oestrus was first observed and the heifer inseminated was 26.5 months. Fifty per cent of 546 heifers were pregnant by 27 months of age. (author). 18 refs, 7 figs

  9. Impact of Puberty Health Education on Anxiety of Adolescents

    Directory of Open Access Journals (Sweden)

    Hoda Mokari

    2016-05-01

    Full Text Available Adolescents, as a large group in the world, face many physical changes and psychological evolutions in their puberty period. If enough attention is not paid to such changes, negative effects on their health and knowledge may be induced. Thus, it is very important to hold health education approperiate for their needs using new educational methods and confident sources. The main goal of this study is to explore the impact of puberty health education on the anxiety of girls. Itis a quasi-experimental study using clustered sampling which was done on 159 girls from two high schools in Tehran divided into two experimental (N=86 and control (N=73 groups. Then,using a systematic educational plan revised by the researcher and expert panel from Department of Midwifery, all the students and their parents in the experimental group were instructed. Data were gathered by demographic questionnaire and Spielberger Scale. Questionnaires were completed by students in three phases including before, after, and three months after the end of the educational program. Data analysis was performed by paired t-test, independent t-test, Chi square, and multivariate tests. Mean anxiety scores in the experimental and control groups were 90.45 and 85.36 before the education, 78.79 and 85.49 at the end of the education, and 78.46 as well as 87.33 3 months later, respectively.Anxiety scores were statistically different post-intervention (p<0.001 and three months later(p<0.001. Puberty health education programs could reduce anxiety in female adolescents.

  10. Puberty timing associated with diabetes, cardiovascular disease and also diverse health outcomes in men and women: the UK Biobank study.

    Science.gov (United States)

    Day, Felix R; Elks, Cathy E; Murray, Anna; Ong, Ken K; Perry, John R B

    2015-06-18

    Early puberty timing is associated with higher risks for type 2 diabetes (T2D) and cardiovascular disease in women and therefore represents a potential target for early preventive interventions. We characterised the range of diseases and other adverse health outcomes associated with early or late puberty timing in men and women in the very large UK Biobank study. Recalled puberty timing and past/current diseases were self-reported by questionnaire. We limited analyses to individuals of White ethnicity (250,037 women; 197,714 men) and to disease outcomes with at least 500 cases (~ 0.2% prevalence) and we applied stringent correction for multiple testing (corrected threshold P puberty timing was associated with higher risks for angina, hypertension and T2D. Furthermore, compared to the median/average group, earlier or later puberty timing in women or men was associated with higher risks for 48 adverse outcomes, across a range of cancers, cardio-metabolic, gynaecological/obstetric, gastrointestinal, musculoskeletal, and neuro-cognitive categories. Notably, both early and late menarche were associated with higher risks for early natural menopause in women. Puberty timing in both men and women appears to have a profound impact on later health.

  11. Laterization of epileptiform discharges in patients with epilepsy and precocious destructive brain insults

    Directory of Open Access Journals (Sweden)

    Teixeira Ricardo A.

    2004-01-01

    Full Text Available Unilateral destructive brain lesions of early development can result in compensatory thickening of the ipsilateral cranial vault. The aim of this study was to determine the frequency of these bone changes among patients with epilepsy and precocious destructive lesions, and whether a relationship exists between these changes and epileptiform discharges lateralization. Fifty-one patients had their ictal / interictal scalp EEG and skull thickness symmetry on MRI analyzed. Patients were divided into three main groups according to the topographic distribution of the lesion on the MRI: hemispheric (H (n=9; main arterial territory (AT (n=25; arterial borderzone (Bdz (n=17. The EEG background activity was abnormal in 26 patients and were more frequent among patients of group H (p= 0.044. Thickening of the skull was more frequent among patients of group H (p= 0.004. Five patients (9.8% showed discordant lateralization between epileptiform discharges and structural lesion (four of them with an abnormal background, and only two of them with skull changes. In one of these patients, ictal SPECT provided strong evidence for scalp EEG false lateralization. The findings suggest that compensatory skull thickening in patients with precocious destructive brain insults are more frequent among patients with unilateral and large lesions. However, EEG lateralization discordance among these patients seems to be more related to EEG background abnormalities and extent of cerebral damage than to skull changes.

  12. Puberty suppression in gender identity disorder: the Amsterdam experience

    NARCIS (Netherlands)

    Kreukels, B.P.C.; Cohen-Kettenis, P.T.

    2011-01-01

    The use of gonadotropin-releasing hormone analogs (GnRHa) to suppress puberty in adolescents with gender dysphoria is a fairly new intervention in the field of gender identity disorders or transsexualism. GnRHa are used to give adolescents time to make balanced decisions on any further treatment

  13. Lives in a chiaroscuro. Should we suspend the puberty of children with gender identity disorder?

    Science.gov (United States)

    Giordano, S

    2008-08-01

    Transgender children who are not treated for their condition are at high risk of violence and suicide. As a matter of survival, many are willing to take whatever help is available, even if this is offered by illegal sources, and this often traps them into the juvenile criminal system and exposes them to various threats. Endocrinology offers a revolutionary instrument to help children/adolescents with gender identity disorder: suspension of puberty. Suspension of puberty raises many ethical issues, and experts dissent as to when treatment should be commenced and how children should be followed up. This paper argues that suspension of puberty is not only not unethical: if it is likely to improve the child's quality of life and even save his or her life, then it is indeed unethical to defer treatment.

  14. MR imaging of a mature teratoma in third ventricle: case report

    International Nuclear Information System (INIS)

    Kim, Myung Soon; Sung, Ki Joon; Cho, Mee Yon

    1994-01-01

    Teratoma is very rarely developed in the third ventricle. We report a case of third ventricular mature teratoma in 12-year old boy with headache and precocious puberty. In T1WI and Gd-DTPA enhanced T1WI, the mass in the third ventricle showed mixed signal intensities with signal void and partial contrast enhancement. The tumor was confirmed as a mature teratoma including teeth and fatty tissue

  15. MR imaging of a mature teratoma in third ventricle: case report

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Myung Soon; Sung, Ki Joon; Cho, Mee Yon [Wonju College of Medicine, Yonsei University, Wonju (Korea, Republic of)

    1994-01-15

    Teratoma is very rarely developed in the third ventricle. We report a case of third ventricular mature teratoma in 12-year old boy with headache and precocious puberty. In T1WI and Gd-DTPA enhanced T1WI, the mass in the third ventricle showed mixed signal intensities with signal void and partial contrast enhancement. The tumor was confirmed as a mature teratoma including teeth and fatty tissue.

  16. Energetics of growth in semi-precocial shorebird chicks in a warm environment : The African black oystercatcher, Haematopus moquini

    NARCIS (Netherlands)

    Tjorve, Kathleen M. C.; Underhill, Les G.; Visser, G. Henk

    2007-01-01

    We studied prefledging growth, energy expenditure and time budgets of African Black Oystercatcher, Haematopus moquini, chicks on Robben Island, Western Cape, South Africa. The aim of the study was to investigate the effect of parental feeding on the growth and energetics of semi-precocial shorebird

  17. Normalized Urinary Flow at Puberty after Tubularized Incised Plate Urethroplasty for Hypospadias in Childhood.

    Science.gov (United States)

    Andersson, Marie; Doroszkiewicz, Monika; Arfwidsson, Charlotte; Abrahamsson, Kate; Sillén, Ulla; Holmdahl, Gundela

    2015-11-01

    An obstructive urinary flow pattern is frequently seen after tubularized incised plate urethroplasty for hypospadias. However, the significance of this finding has not been determined and long-term results are few. We describe postoperative long-term uroflowmetry results after puberty in males who underwent tubularized incised plate urethroplasty in childhood. A total of 126 boys underwent tubularized incised plate urethroplasty for distal penile to mid shaft hypospadias at Queen Silvia Children's Hospital in Gothenburg between 1999 and 2003. Of the patients 48 were toilet trained at surgery. We report on 40 patients who had data available at 2 and 12 months postoperatively, 7 years postoperatively and at puberty (median age 15.0 years, range 13.7 to 17.1). Of the patients 31 had distal and 9 had mid penile hypospadias. Clinical examination, urinary medical history, uroflowmetry and ultrasound measuring residual urine were performed. Maximum urinary flow was correlated to age and voided volume, using Miskolc nomograms for comparison of percentiles. At 1 year postoperatively 15 boys (37.5%) had normal urinary flow (above 25th percentile), compared to 16 (40%) at 7 years and 38 (95%) at puberty (p puberty for boys with hypospadias treated with tubularized incised plate urethroplasty. Unless symptoms occur, a conservative approach seems preferable. Copyright © 2015 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.

  18. Puberty and Perimenopause: Reproductive Transitions and their Implications for Women's Health

    Science.gov (United States)

    Hoyt, Lindsay T.; Falconi, April

    2015-01-01

    This scoping review synthesizes existing research on two major transitions in females’ lives: puberty and perimenopause. These two periods of vast physiological change demarcate the beginning and the end of the reproductive life cycle and are associated with major neuroendocrine reorganization across two key systems, the hypothalamic-pituitary-gonadal (HPG) axis the hypothalamus-pituitary-adrenal (HPA) axis. Despite growing evidence suggesting that the timing and experience of puberty and perimenopause are related to various physical and mental health outcomes (e.g., mood disorders, metabolism, cardiovascular health, autoimmune conditions and cancer), these two processes are rarely examined together. In this paper, we bridge these disparate literatures to highlight similarities, isolate inconsistencies, and identify important areas for future research in women’s health. PMID:25797100

  19. A possible association between dietary intake of copper, zinc and phosphate and delayed puberty in heifers in Sudan.

    Science.gov (United States)

    Ahmed, M M M; Fadlalla, I M T; Barri, M E S

    2002-02-01

    Zinc and copper deficiencies have been reported in heifers of various breeds at four different locations in Sudan. These were Kuku (5 km north of Khartoum), Seleit (20 km northwest of Khartoum), Medani (180 km south of Khartoum) and El Obeid (600 km west of Khartoum). Phosphorus deficiency was only observed in the serum of heifers at El Obeid. The heifers at all locations showed delayed puberty, stunted growth and infertility. The heifers of the local breeds at El Obeid only attained puberty by 1530 days of age compared with 840 days for the pure Friesian heifers at Seleit. The crossbred animals at Kuku and Medani attained puberty at 1440 and 1020 days of age, respectively. The marginal or low zinc and copper contents in pasture, soil or animal feed may have been predisposing factors for the observed deficiencies and might have been responsible for the delayed age of puberty.

  20. Puberty and Fertility of Ewe Lambs Fed on By-products of Palm and Olive Oil

    International Nuclear Information System (INIS)

    EL-T arabany, A.A.; Mostafa, M.M.M.; Mohamed, A.K.

    2017-01-01

    The present study aims to elucidate the effect of palm and olive oil by-products adding to rations on production and reproductive performance of Rahmani and Osimi female sheep. After weaning, Rahmani and Osimi ewe lambs (24 for each) of similar birth type were identified to compare between two rations containing hard fatty acids (HFA) or olive cake (OC) on sexual puberty and fertility of two breeds. The lambs of both breed were randomly divided into three groups: the first group is considered control and received ration which contained concentrate feed mixture (CFM). The second group nourished (OC) consisted of CFM +HFA and the third group nourished (HFA) composed of CFM +OC. The CFM was offered as basal ration to all experimental lambs. Body weight, functions of the liver, kidney, thyroid and progesterone hormones at puberty, and the fertility traits were assayed in the two breeds of ewes. The average body weight of female lambs was higher (P<0.05) with OC than HFA. Female lambs supplied OC reached puberty faster and their thyroid and sexual hormones (progesterone) have been developed earlier than ewe lambs given HFA and those in the control group. Age at puberty and progesterone level in both Rahmani and Osimi ewe lambs were better in ewes fed on OC , than other two groups. The fertility (%) from total ewe lambs and birth weight in ewe lambs fed on OC were higher than ewes fed on HFA and the control. It may be concluded that feeding ewe lambs on diet containing HFA from weaning had positive effects on age at puberty, reproductive fertility and prolificacy

  1. Determinants of puberty health among female adolescents residing in boarding welfare centers in Tehran: An application of health belief model.

    Science.gov (United States)

    Shirzadi, Shayesteh; Asghari Jafarabadi, Mohammad; Nadrian, Haidar; Mahmoodi, Hassan

    2016-01-01

    Background: Adolescence is a critical stage of growth and development. That is associated with changes in body shape and appearance. Issues such as irregular menstrual periods, amenorrhea, and menstrual cycle are major issues in women's health. The purpose of this study was to examine the determinants of physical puberty health based on the Health Belief Model (HBM) among female adolescents. Methods: This analytical cross sectional study was conducted in welfare boarding centers in Tehran, Iran. Data were collected in 2011 by a structured and valid questionnaire. Total 61 female adolescents (age range: 12-19 yrs) participated in this study from welfare boarding centers in Iran, Tehran, by using convenience sampling method. The questionnaire consisted of demographic characteristics, health belief model constructs and physical puberty health behaviors gathered by using interview. A series of univariate general linear models were used to assess the relationship between puberty health and health belief model constructs. Results: According to the results of this study there were positive significant relationships between perceived susceptibility, perceived benefits, perceived barriers, cues to action and increased puberty health in female adolescents (p<0.05). Perceived benefits, perceived barriers and cues to action were predictors of physical puberty health behaviors. Conclusion: Based on the results of the study to improve the physical Puberty health behaviors of female adolescents should make them aware of the benefits of health behaviors, and remove or reform the perceived barriers of health behaviors. Also, the appropriate information resources should be introduced for obtaining information about puberty health.

  2. Puberty and Adolescence as a Time of Vulnerability to Stressors that Alter Neurobehavioral Processes

    Science.gov (United States)

    Holder, Mary K.; Blaustein, Jeffrey D.

    2013-01-01

    Puberty and adolescence are major life transitions during which an individual’s physiology and behavior changes from that of a juvenile to that of an adult. Here we review studies documenting the effects of stressors during pubertal and adolescent development on the adult brain and behavior. The experience of complex or compound stressors during puberty/adolescence generally increases stress reactivity, increases anxiety and depression, and decreases cognitive performance in adulthood. These behavioral changes correlate with decreased hippocampal volumes and alterations in neural plasticity. Moreover, stressful experiences during puberty disrupt behavioral responses to gonadal hormones both in sexual performance and on cognition and emotionality. These behavioral changes correlate with altered estrogen receptor densities in some estrogen-concentrating brain areas, suggesting a remodeling of the brain’s response to hormones. A hypothesis is presented that activation of the immune system results in chronic neuroinflammation that may mediate the alterations of hormone-modulated behaviors in adulthood. PMID:24184692

  3. Induction of puberty in the hypogonadal girl--practices and attitudes of pediatric endocrinologists in Europe

    DEFF Research Database (Denmark)

    Kiess, W; Conway, G; Ritzen, M

    2002-01-01

    The management of children and adolescents with hypogonadism and in particular the induction of puberty in the hypogonadal girl is subject to controversy. Therefore, under the auspices and through organization of the Drugs and Therapeutics Committee of the European Society of Paediatric Endocrino......The management of children and adolescents with hypogonadism and in particular the induction of puberty in the hypogonadal girl is subject to controversy. Therefore, under the auspices and through organization of the Drugs and Therapeutics Committee of the European Society of Paediatric...... of the results of the questionnaires and discussions of that session to further the discussion on and knowledge of current concepts of induction of puberty in the hypogonadal girl in Europe. It became clear from the data accumulated here that the start of treatment, the aims of therapy and the modalities of how...

  4. Spermaturia and serum hormone concentrations at the age of puberty in boys prenatally exposed to polychlorinated biphenyls

    DEFF Research Database (Denmark)

    Mol, Nanette M; Sørensen, Nicolina; Weihe, Pal

    2002-01-01

    To determine whether prenatal exposure to polychlorinated biphenyls (PCBs) with possible hormone-disrupting effects is capable of affecting sexual differentiation in boys at the age of puberty.......To determine whether prenatal exposure to polychlorinated biphenyls (PCBs) with possible hormone-disrupting effects is capable of affecting sexual differentiation in boys at the age of puberty....

  5. Young Adult Psychological Outcome After Puberty Suppression and Gender Reassignment

    NARCIS (Netherlands)

    de Vries, A.L.C.; McGuire, J.K.; Steensma, T.D.; Wagenaar, E.C.F.; Doreleijers, T.A.H.; Cohen-Kettenis, P.T.

    2014-01-01

    BACKGROUND: In recent years, puberty suppression by means of gonadotropin-releasing hormone analogs has become accepted in clinical management of adolescents who have gender dysphoria (GD). The current study is the first longer-term longitudinal evaluation of the effectiveness of this approach.

  6. Incidence, puberty, and fertility in 45,X/47,XXX mosaicism: Report of a patient and a literature review.

    Science.gov (United States)

    Lim, Han Hyuk; Kil, Hong Ryang; Koo, Sun Hoe

    2017-05-09

    Turner syndrome (TS), characterized by short stature and premature ovarian failure, is caused by chromosomal aberrations with total or partial loss of one of the two X chromosomes. Spontaneous puberty, menarche, and pregnancy occur in some patients depending on the abnormality of the X. Moreover, spontaneous pregnancy is uncommon (XXX karyotype is extremely rare. Previous reports have demonstrated that TS with 45,X/47,XXX is less severe than common TS due to higher occurrence of puberty (83%), menarche (57-67%), and fertility (14%) and lower occurrence of congenital anomalies (XXX mosaicism who presented with short stature. She showed mild TS phenotype including short stature but had spontaneous puberty. Based on our case and previous reports, we expect that girls with 45,X/47,XXX mosaicism may progress through puberty normally, without estrogen therapy. Therefore, it is necessary to consider specific guidelines for clinical decisions surrounding pubertal development and fertility in TS with 45,X/47,XXX karyotype. © 2017 Wiley Periodicals, Inc.

  7. Diagnosis and treatment of polycystic ovarian syndrome in adolescents.

    Science.gov (United States)

    Nicandri, Katrina F; Hoeger, Kathleen

    2012-12-01

    To review what is understood about the pathophysiology of polycystic ovarian syndrome (PCOS), the diagnostic challenges of PCOS in adolescent women, associated risk factors, as well as the best evidence-based treatment options for adolescence. Diagnosing PCOS in adolescents requires a unique set of criteria for which no single marker currently exists. Adolescents at high risk for developing the syndrome are congenital virilization, low birth weight, premature pubarche, central precocious puberty, large for gestational age girls born to overweight mothers, obesity syndromes, insulin-resistant features, and girls born to parents with PCOS, central obesity, or diabetes in whom PCOS ought to be suspected when associated with irregular menses. Insulin, hyperandrogenemia, and adipocytokines are integral players in the pathophysiology of PCOS. PCOS may be an inheritable trait; however, no gene has yet been identified. Quality of life remains a concern for young women with PCOS. Lifestyle modifications geared to prevent long-term sequelae remain the first-line treatment in conjunction with oral contraceptive pills. Identifying PCOS in adolescents remains a diagnostic dilemma, but early intervention and treatment can improve long-term health.

  8. Peer Relationships and Depressive Symptomatology in Boys at Puberty

    Science.gov (United States)

    Mendle, Jane; Harden, K. Paige; Brooks-Gunn, Jeanne; Graber, Julia A.

    2012-01-01

    The physical changes of puberty coincide with an increase in the salience of peer relationships and a growing risk for depression and other forms of psychopathology. Previously, we reported that pubertal tempo, defined as a child's rate of intraindividual change in pubertal status (measured using parent-reported Tanner stages; Marshall & Tanner,…

  9. RNAi-mediated knockdown of SPOOK reduces ecdysteroid titers and causes precocious metamorphosis in the desert locust Schistocerca gregaria.

    Science.gov (United States)

    Sugahara, Ryohei; Tanaka, Seiji; Shiotsuki, Takahiro

    2017-09-01

    The Halloween gene SPOOK (SPO) is involved in the production of the active metabolite of ecdysteroid, 20-hydroxyecdysone (20E), in insects. A previous study showed that RNAi-mediated knockdown of SPO in Schistocerca gregaria last instar nymphs markedly reduced the hemolymph 20E titer, but did not affect metamorphosis. In the present study, the effects of SPO interference on development were re-examined in this locust. Injections of SPO double-stranded RNA (dsSPO) into nymphs at mid and late instars significantly delayed nymphal development and interfered with molting. The 20E levels of dsSPO-treated nymphs were generally low, with a delayed, small peak, suggesting that disturbance of the 20E levels caused the above developmental abnormalities. A small proportion of the dsSPO-injected nymphs metamorphosed precociously, producing adults and adultoids. Precocious adults were characterized by small body size, short wings with abbreviated venation, and normal reproductive activity. Fourth instar nymphs that precociously metamorphosed at the following instar exhibited temporal expression patterns of ecdysone-induced protein 93F and the juvenile hormone (JH) early-inducible gene Krüppel homolog 1 similar to those observed at the last instar in normal nymphs. Adultoids displayed mating behavior and adultoid females developed eggs, but never laid eggs. JH injection around the expected time of the 20E peak in the dsSPO-injected nymphs completely inhibited the appearance of adultoids, suggesting that appearance of adultoids might be due to a reduced titer of JH rather than of 20E. These results suggest that SPO plays an important role in controlling morphogenesis, metamorphosis, and reproduction in S. gregaria. Copyright © 2017 Elsevier Inc. All rights reserved.

  10. Duplication of the glans penis manifested at puberty.

    Science.gov (United States)

    Gentileschi, S; Bracaglia, R; Seccia, A; Farallo, E

    2006-01-01

    We report the case of a complete duplication of the glans, with prepuce and a blind end urethra just proximal to the dorsal aspect of the balanopreputial fold. The malformation was not evident at birth and during childhood, and became manifest only at puberty, with the growth of the external genitalia. It was not associated with other urinary malformations. Surgical excision was easy and uneventful.

  11. Schmidt's syndrome: a rare cause of puberty menorrhagia.

    Science.gov (United States)

    Sharma, J B; Tiwari, S; Gulati, N; Sharma, S

    1990-12-01

    Schmidt's syndrome, also known as polyglandular deficiency syndrome, is the presence of Addison's disease and hypothyrodism in a single patient. It is usually associated with other autoimmune disorders like vitiligo, diabetes mellitus, myasthenia gravis. A rare case of an 18-year-old girl having Schmidt's syndrome and vitiligo who presented with puberty menorrhagia is reported. A brief review of the literature is also given.

  12. Primary School Puberty/Sexuality Education: Student-Teachers' Past Learning, Present Professional Education, and Intention to Teach These Subjects

    Science.gov (United States)

    Goldman, Juliette D. G.; Coleman, Stephanie J.

    2013-01-01

    Primary school teachers are often tasked with puberty/sexuality education for students who are undergoing sexual maturation at ever-earlier ages. This study explores the changing trajectories of the pre-service learning and teaching of primary school puberty/sexuality education at an urban university, including student-teachers' childhood…

  13. Imaging of pediatric pituitary endocrinopathies

    Science.gov (United States)

    Chaudhary, Vikas; Bano, Shahina

    2012-01-01

    Accurate investigation of the hypothalamic-pituitary area is required in pediatric patients for diagnosis of endocrine-related disorders. These disorders include hypopituitarism, growth failure, diencephalic syndrome, delayed puberty, precocious puberty, diabetes insipidus, syndrome of inappropriate antidiuretic hormone (SIADH) secretion, and hyperpituitarism. Magnetic resonance imaging (MRI) is the modality of choice to visualize hypothalamic-pituitary axis and associated endocrinopathies. Neuroimaging can be normal or disclose abnormalities related to pituitary-hypothalamic axis like (i) congenital and developmental malformations; (ii) tumors; (iii) cystic lesions; and (iv) infectious and inflammatory conditions. Classical midline anomalies like septo-optic dysplasias or corpus callosum agenesis are commonly associated with pituitary endocrinopathies and also need careful evaluation. In this radiological review, we will discuss neuroendocrine disorders related to hypothalamic pituitary-axis. PMID:23087850

  14. Permanent hypopituitarism is rare after structural traumatic brain injury in early childhood.

    Science.gov (United States)

    Heather, Natasha L; Jefferies, Craig; Hofman, Paul L; Derraik, José G B; Brennan, Christine; Kelly, Patrick; Hamill, James K M; Jones, Rhys G; Rowe, Deborah L; Cutfield, Wayne S

    2012-02-01

    We sought to determine the incidence of permanent hypopituitarism in a potentially high-risk group: young children after structural traumatic brain injury (TBI). We conducted a cross-sectional study with longitudinal follow-up. Dynamic tests of pituitary function (GH and ACTH) were performed in all subjects and potential abnormalities critically evaluated. Puberty was clinically staged; baseline thyroid function, prolactin, IGF-I, serum sodium, and osmolality were compared with age-matched data. Diagnosis of GH deficiency was based on an integrated assessment of stimulated GH peak (hypopituitarism were recorded. Permanent hypopituitarism is rare after both inflicted and accidental structural TBI in early childhood. Precocious puberty was the only pituitary hormone abnormality found, but the prevalence did not exceed that of the normal population.

  15. Puberty and Pubertal Growth in GH-treated SGA Children: Effects of 2 Years of GnRHa Versus No GnRHa.

    Science.gov (United States)

    van der Steen, Manouk; Lem, Annemieke J; van der Kaay, Danielle C M; Hokken-Koèelega, Anita C S

    2016-05-01

    Most studies on puberty in children born small for gestational age (SGA) report height and age at onset of puberty. GH-treated SGA children with an adult height (AH) expectation below -2.5 SDS at onset of puberty can benefit from an additional 2 years of GnRH analog (GnRHa) treatment. There are no data on puberty and growth after discontinuation of GnRHa treatment in GH-treated SGA children. This study aimed to investigate the effects on puberty and pubertal growth of 2 years GnRHa vs no GnRHa in GH-treated SGA children. This was a GH trial involving 76 prepubertal short SGA children (36 girls) treated with GH. Thirty-two children received additional GnRHa for 2 years. Pubertal stages were 3-monthly assessed according to Tanner. Age, bone age, and median height at pubertal onset were lower in girls and boys in the GH/GnRHa group compared with the GH group. In girls and boys treated with GH/GnRHa, pubertal duration after stop of GnRHa treatment was shorter than pubertal duration in those with GH only (40.9 vs 46.7 mo; P = .044; 50.8 vs 57.5 months; P = .006; respectively). Height gain from onset of puberty until AH, including height gain during 2 years of GnRHa treatment, was 25.4 cm in girls and 33.0 cm in boys, which was 6.6 cm more than girls and boys treated with GH only. AH was similar in children treated with GH/GnRHa compared with those with GH only. GH-treated SGA children who start puberty with an AH expectation below -2.5 SDS and are treated with 2 years of GnRHa have a shorter pubertal duration after discontinuation of GnRHa compared with pubertal duration in children treated with GH only. Height gain from onset of puberty until AH is, however, more due to adequate growth during 2 years of GnRHa treatment resulting in a similar AH as children treated with GH only.

  16. Adolescent Violent Victimization and Precocious Union Formation.

    Science.gov (United States)

    C Kuhl, Danielle; Warner, David F; Wilczak, Andrew

    2012-11-01

    This article bridges scholarship in criminology and family sociology by extending arguments about "precocious exits" from adolescence to consider early union formation as a salient outcome of violent victimization for youths. Research indicates that early union formation is associated with several negative outcomes; yet the absence of attention to union formation as a consequence of violent victimization is noteworthy. We address this gap by drawing on life course theory and data from the National Longitudinal Study of Adolescent Health (Add Health) to examine the effect of violent victimization ("street" violence) on the timing of first co-residential union formation-differentiating between marriage and cohabitation-in young adulthood. Estimates from Cox proportional hazard models show that adolescent victims of street violence experience higher rates of first union formation, especially marriage, early in the transition to adulthood; however, this effect declines with age, as such unions become more normative. Importantly, the effect of violent victimization on first union timing is robust to controls for nonviolent delinquency, substance abuse, and violent perpetration. We conclude by discussing directions for future research on the association between violent victimization and coresidential unions with an eye toward the implications of such early union formation for desistance.

  17. Role of Kisspeptin and Neurokinin B in Puberty in Female Non-Human Primates

    Directory of Open Access Journals (Sweden)

    Ei Terasawa

    2018-04-01

    Full Text Available In human patients, loss-of-function mutations in the genes encoding kisspeptin (KISS1 and neurokinin B (NKB and their receptors (KISS1R and NK3R, respectively result in an abnormal timing of puberty or the absence of puberty. To understand the neuroendocrine mechanism of puberty, we investigated the contribution of kisspeptin and NKB signaling to the pubertal increase in GnRH release using rhesus monkeys as a model. Direct measurements of GnRH and kisspeptin in the median eminence of the hypothalamus with infusion of agonists and antagonists for kisspeptin and NKB reveal that kisspeptin and NKB signaling stimulate GnRH release independently or collaboratively by forming kisspeptin and NKB neuronal networks depending on the developmental age. For example, while in prepubertal females, kisspeptin and NKB signaling independently stimulate GnRH release, in pubertal females, the formation of a collaborative kisspeptin and NKB network further accelerates the pubertal increase in GnRH release. It is speculated that the collaborative mechanism between kisspeptin and NKB signaling to GnRH neurons is necessary for the complex reproductive function in females.

  18. Treatment of early puberty in adopted and non-adopted children: when, why and how : Auxological, psychological and ethical aspects of growth promoting treatment around puberty

    NARCIS (Netherlands)

    D. Mul (Dick)

    2000-01-01

    textabstractNormal puberty is the result of the maturation of the hypothalamo-pituitary-gonadal (HPG) axis. Primary and secondary sexual characteristics develop by the increase in the serum levels of gonadal steroids: oestradiol in girls and testosterone in boys. The main players in the process of

  19. Puberty as a Critical Risk Period for Eating Disorders: A Review of Human and Animal Studies

    OpenAIRE

    Klump, Kelly L.

    2013-01-01

    Puberty is one of the most frequently discussed risk periods for the development of eating disorders. Prevailing theories propose environmentally mediated sources of risk arising from the psychosocial effects (e.g., increased body dissatisfaction, decreased self-esteem) of pubertal development in girls. However, recent research highlights the potential role of ovarian hormones in phenotypic and genetic risk for eating disorders during puberty. The goal of this paper is to review data from hum...

  20. Increased functional connectivity with puberty in the mentalising network involved in social emotion processing

    Science.gov (United States)

    Klapwijk, Eduard T.; Goddings, Anne-Lise; Heyes, Stephanie Burnett; Bird, Geoffrey; Viner, Russell M.; Blakemore, Sarah-Jayne

    2015-01-01

    There is increasing evidence that puberty plays an important role in the structural and functional brain development seen in adolescence, but little is known of the pubertal influence on changes in functional connectivity. We explored how pubertal indicators (salivary concentrations of testosterone, oestradiol and DHEA; pubertal stage; menarcheal status) relate to functional connectivity between components of a mentalising network identified to be engaged in social emotion processing by our prior work, using psychophysiological interaction (PPI) analysis. Female adolescents aged 11 to 13 years were scanned whilst silently reading scenarios designed to evoke either social emotions (guilt and embarrassment) or basic emotions (disgust and fear), of which only social compared to basic emotions require the representation of another person’s mental states. Pubertal stage and menarcheal status were used to assign participants to pre/early or mid/late puberty groups. We found increased functional connectivity between the dorsomedial prefrontal cortex (DMPFC) and the right posterior superior temporal sulcus (pSTS) and right temporo-parietal junction (TPJ) during social relative to basic emotion processing. Moreover, increasing oestradiol concentrations were associated with increased functional connectivity between the DMPFC and the right TPJ during social relative to basic emotion processing, independent of age. Our analysis of the PPI data by phenotypic pubertal status showed that more advanced puberty stage was associated with enhanced functional connectivity between the DMPFC and the left anterior temporal cortex (ATC) during social relative to basic emotion processing, also independent of age. Our results suggest increased functional maturation of the social brain network with the advancement of puberty in girls. PMID:23998674

  1. Physiology and Endocrinology Symposium. Factors controlling puberty in beef heifers

    Science.gov (United States)

    The Physiology and Endocrinology Symposium on “Factors controlling puberty in beef heifers” was held at the joint annual meeting of the American Dairy Science Association and the American Society of Animal Science in New Orleans, Louisiana, USA, July 10 to 14, 2011. The objective of the symposium w...

  2. An Early Window of Opportunity for Promoting Girls' Health: Policy Implications of the Girl's Puberty Book Project in Tanzania

    Science.gov (United States)

    Sommer, Marni

    2011-01-01

    The onset of puberty, and specifically menstruation, is an opportune moment for reaching girls as they transition into adolescence and young womanhood. Despite the importance of this transitional period, the reproductive health community has tended to overlook the onset of menstruation and early puberty in global, national and local policy and…

  3. Constitutional delay of puberty: presentation and inheritance pattern in 48 familial cases.

    Science.gov (United States)

    Winter, Sarah; Ousidhoum, Aldjia; McElreavey, Kenneth; Brauner, Raja

    2016-03-12

    The mechanism that initiates the onset of puberty is largely unknown but the age of onset is mainly under genetic control and influenced by environmental factors including nutrition. Familial forms of constitutional delay of puberty (CDP) suggest the involvement of genetic factors. The purpose of this study is to describe the presentation and the mode of inheritance of CDP in a series of familial cases. A retrospective, single center study was carried out over 10 years on 48 probands (14 girls and 34 boys) from 48 families seen for CDP with a familial component. Of the 48 probands, 46 (96 %) had at least one affected 1(st) degree relatives and 2 (4 %, 2 boys) had only 2(nd) degree relatives affected. In girls, 11 families (79 %) exhibited exclusive maternal inheritance, 1 (7 %) paternal inheritance and 2 (14 %) both maternal and paternal inheritance. In boys, 14 families (41 %) exhibited exclusive maternal inheritance, 12 (35 %) paternal inheritance and 8 (24 %) both maternal and paternal inheritance. In the boys with bilineal inheritance, the ages at onset of puberty (16 ± 1.41 years) and at evaluation (16.05 ± 2.47 years) were higher than in those with unilineal inheritance (15.25 ± 0.35 and 15.1 ± 0.42 years respectively), but the difference was not significant. In girls exclusive maternal inheritance seems to be the major mode of inheritance whereas for boys the mode of inheritance was almost equally maternal, paternal or bilineal. Clinical phenotype of boys with bilineal inheritance seems to be more severe, but the difference did not reach statistical significance, perhaps because of the small sample size. This greater severity of the phenotype in boys with bilineal inheritance is likely due to inheriting different puberty timing genes from each parent. Future research should be directed at identifying such genes.

  4. Hamartomas of the tuber cinereum

    Energy Technology Data Exchange (ETDEWEB)

    Diebler, C; Ponsot, G

    1983-05-01

    The hamartoma of the tuber cinereum, a midline dysraphic syndrome, corresponds to a mass of normal neuronal tissue implanted in the area of the mamillary bodies. It has no evolutionary potential, but association to other cerebral malformations has been observed. On the basis of 18 personal cases and a review of the literature, the authors evaluate the actual diagnostic criteria and the incidence of different clinical signs such as precocious isosexual puberty, seizures, and mental impairment.

  5. Hamartomas of the tuber cinereum

    International Nuclear Information System (INIS)

    Diebler, C.; Ponsot, G.

    1983-01-01

    The hamartoma of the tuber cinereum, a midline dysraphic syndrome, corresponds to a mass of normal neuronal tissue implanted in the area of the mamillary bodies. It has no evolutionary potential, but association to other cerebral malformations has been observed. On the basis of 18 personal cases and a review of the literature, the authors evaluate the actual diagnostic criteria and the incidence of different clinical signs such as precocious isosexual puberty, seizures, and mental impairment. (orig.)

  6. MR appearance of hypothalamic hamartoma

    Energy Technology Data Exchange (ETDEWEB)

    Hahn, F.J.; Leibrock, L.G.; Huseman, C.A.; Makos, M.M.

    1988-02-01

    Hypothalamic hamartoma is the most common detectable cerebral lesion causing precocious puberty. Two histologically confirmed cases were studied by computerized tomography (CT) and magnetic resonance (MR) imaging. T2 weighted, sagittal MR images were superior to CT in delineating the tumor from surrounding grey matter. The lesion was isointense to grey matter on T1 weighted images allowing exclusion of other hypothalamic tumors. MR will undoubtedly become the imaging modality of choice in the detection of hypothalamic hamartoma.

  7. Solitary infantile choriocarcinoma of the liver: MRI findings

    Energy Technology Data Exchange (ETDEWEB)

    Hoef, Marianne van der; Willi, Ulrich V.; Huisman, Thierry A.G.M. [University Children' s Hospital Zurich, Department of Diagnostic Imaging, Zurich (Switzerland); Niggli, Felix K. [University Children' s Hospital Zurich, Department of Paediatrics, Zurich (Switzerland)

    2004-10-01

    Infantile hepatic choriocarcinoma is a rare, highly malignant germ-cell tumour believed to result from a choriocarcinoma of the placenta that spreads to the child. Most infants present with a characteristic clinical picture of anaemia, hepatomegaly and precocious puberty. Imaging findings, including conventional MRI, may be non-specific. To improve the accuracy of diagnosis, we present the imaging findings of contrast-enhanced dynamic MRI in a 4.5-month-old boy with infantile hepatic choriocarcinoma. (orig.)

  8. Maturation of kisspeptinergic neurons coincides with puberty onset in male rats

    DEFF Research Database (Denmark)

    Bentsen, Agnete H; Ansel, Laura; Simonneaux, Valerie

    2010-01-01

    receptor is the primary component in the initiation of puberty and where in the hypothalamus regulation of the kisspeptin/Kiss1R system occurs is unresolved. Using immunohistochemistry and in situ hybridization, we analyzed the level of Kiss1 mRNA and kisspeptin-immunoreactivity in the anteroventral...... periventricular nucleus (AVPV) and the arcuate nucleus of male rats along pubertal development. Neurons expressing Kiss1 mRNA were first detected at PND15, but increased significantly around puberty, and declined again in the adult rat. While virtually no immunoreactive cell bodies were detectable in the AVPV...... at any age, numerous kisspeptin-positive neurons in the arcuate nucleus were detected in the adult rat. Increasing doses of kisspeptin-54 given peripherally to male rats at PND15, 30, 45, and 60 evoked roughly similar effects, as revealed by the induction of c-Fos in the pituitary and secretion of LH...

  9. New insights into the factors mediating the onset of puberty in sea bass.

    Science.gov (United States)

    Espigares, F; Rocha, A; Molés, G; Gómez, A; Carrillo, M; Zanuy, S

    2015-12-01

    In populations of 1-year-old male European sea bass (Dicentrarchus labrax), only large males are able to acquire for the first time a functional competence of their reproductive axis; in other words, to attain puberty. To examine the causes and mechanisms involved in the onset of puberty in this species, a size sorting sampling was carried out to obtain two experimental groups of small and large male fish exhibiting different growth rates. As expected, only large fish reached full spermiogenesis (stage V of testicular development) by the end of the experiment. Our study suggests that fish size is a permissive condition to ensure full effectiveness of the hormonal (Gnrh1, gonadotropins and sexual steroids) actions. Thus, though small fish had endocrine profiles similar to those of large fish, their amplitude was much lower, and was most likely the reason why functional competence of the reproductive axis was not achieved. Moreover, this work provides evidence of the involvement of kisspeptin and Gnrh1 systems in the onset of puberty in a marine teleost fish. It also indicates that very likely kisspeptin and Gnrh1 may regulate gonadotropins and sex steroids at specific stages of testicular development. Copyright © 2015 Elsevier Inc. All rights reserved.

  10. The Family Antecedents and the Subsequent Outcomes of Early Puberty

    Science.gov (United States)

    Arim, Rubab G.; Tramonte, Lucia; Shapka, Jennifer D.; Dahinten, V. Susan; Willms, J. Douglas

    2011-01-01

    The purpose of this study was to examine both the family antecedents and the outcomes of early puberty, with a particular focus on factors related to family socioeconomic status (SES). The study employed a comprehensive measurement of pubertal development and longitudinal data from the Canadian National Longitudinal Survey of Children and Youth.…

  11. Adolescent Violent Victimization and Precocious Union Formation*

    Science.gov (United States)

    C. Kuhl, Danielle; Warner, David F.; Wilczak, Andrew

    2013-01-01

    This article bridges scholarship in criminology and family sociology by extending arguments about “precocious exits” from adolescence to consider early union formation as a salient outcome of violent victimization for youths. Research indicates that early union formation is associated with several negative outcomes; yet the absence of attention to union formation as a consequence of violent victimization is noteworthy. We address this gap by drawing on life course theory and data from the National Longitudinal Study of Adolescent Health (Add Health) to examine the effect of violent victimization (“street” violence) on the timing of first co-residential union formation—differentiating between marriage and cohabitation—in young adulthood. Estimates from Cox proportional hazard models show that adolescent victims of street violence experience higher rates of first union formation, especially marriage, early in the transition to adulthood; however, this effect declines with age, as such unions become more normative. Importantly, the effect of violent victimization on first union timing is robust to controls for nonviolent delinquency, substance abuse, and violent perpetration. We conclude by discussing directions for future research on the association between violent victimization and coresidential unions with an eye toward the implications of such early union formation for desistance. PMID:24431471

  12. Influence of the body weight on the onset and progression of puberty in boys.

    Science.gov (United States)

    Tomova, Analia; Robeva, Ralitsa; Kumanov, Philip

    2015-07-01

    Unlike in girls, the data on the relationship between pubertal development and body weight in boys are controversial. We measured the height, body weight, body mass index (BMI), pubic hair stages, testicular volume, penis length and circumference of 4030 boys, aged between 7 and 19 years. According to their body weight, the investigated children and adolescents were divided in four groups at each age: underweight boys (BMI puberty occurred when the boys' weight gained 40.33±9.03 kg (median 39.00) and BMI was 18.62±3.12 kg/m2 (median 17.80), whereas the late stage was reached at weight of 62.44±10.39 kg (median 61.00) and BMI 21.47±2.84 kg/m2 (median 21.20). Earlier maturing boys were heavier than their coevals, whereas underweight boys developed puberty later. The onset and progression of puberty in boys are in a significant positive relationship with weight and BMI. Moreover, in the overweight boys pubertal development begins and comes to the late stage earlier in comparison with normal weight children, whereas in those who are underweight a delay at every stage of the development is observed.

  13. Silent Crooke’s cell corticotroph adenoma of the pituitary gland presenting as delayed puberty

    Directory of Open Access Journals (Sweden)

    Dinesh Giri

    2017-03-01

    Full Text Available Corticotroph adenomas are extremely rare in children and adolescents. We present a 15-year-old boy who was investigated for delayed puberty (A1P2G1, bilateral testicular volumes of 3 mL each. There was no clinical or laboratory evidence suggestive of chronic illness, and the initial clinical impression was constitutional delay in puberty. Subsequently, MRI scan of the brain revealed the presence of a mixed cystic and solid pituitary lesion slightly displacing the optic chiasma. The lesion was removed by transphenoidal surgery and the biopsy confirmed the lesion to be pituitary adenoma. Furthermore, the adenoma cells also had Crooke’s hyaline changes and were intensely positive for ACTH. However there was no clinical/biochemical evidence of ACTH excess. There was a spontaneous pubertal progression twelve months after the surgery (A2P4G4, with bilateral testicular volume of 8 mL. Crooke’s cell adenoma is an extremely rare and aggressive variant of corticotroph adenoma that can uncommonly present as a silent corticotroph adenoma in adults. We report for the first time Crooke’s cell adenoma in an adolescent boy presenting with delayed puberty.

  14. Puberty and Sexuality Education Using a Learning and Teaching Theoretical Framework

    Science.gov (United States)

    Collier-Harris, Christine A.; Goldman, Juliette D. G.

    2017-01-01

    All children need timely puberty and sexuality education. The task falls to schools because they have the learning and teaching processes, competency programmes, opportunities, and resources for age-appropriate cognitive, knowledge, and skills development in children and adolescents. Quality sexuality education guidance documents have been…

  15. Sex- and brain region-specific patterns of gene expression associated with socially-mediated puberty in a eusocial mammal.

    Directory of Open Access Journals (Sweden)

    Mariela Faykoo-Martinez

    Full Text Available The social environment can alter pubertal timing through neuroendocrine mechanisms that are not fully understood; it is thought that stress hormones (e.g., glucocorticoids or corticotropin-releasing hormone influence the hypothalamic-pituitary-gonadal axis to inhibit puberty. Here, we use the eusocial naked mole-rat, a unique species in which social interactions in a colony (i.e. dominance of a breeding female suppress puberty in subordinate animals. Removing subordinate naked mole-rats from this social context initiates puberty, allowing for experimental control of pubertal timing. The present study quantified gene expression for reproduction- and stress-relevant genes acting upstream of gonadotropin-releasing hormone in brain regions with reproductive and social functions in pre-pubertal, post-pubertal, and opposite sex-paired animals (which are in various stages of pubertal transition. Results indicate sex differences in patterns of neural gene expression. Known functions of genes in brain suggest stress as a key contributing factor in regulating male pubertal delay. Network analysis implicates neurokinin B (Tac3 in the arcuate nucleus of the hypothalamus as a key node in this pathway. Results also suggest an unappreciated role for the nucleus accumbens in regulating puberty.

  16. Adult height after spontaneous pubertal growth or GnRH analog treatment in girls with early puberty: a meta-analysis.

    Science.gov (United States)

    Bertelloni, Silvano; Massart, Francesco; Miccoli, Mario; Baroncelli, Giampiero I

    2017-06-01

    Early puberty (EP) has been defined as the onset of puberty in the low-normal range; it may be a cause for concern regarding a possible impairment of adult height (AH). This paper meta-analysed data on AH after spontaneous growth or after gonadotropin-releasing hormone (GnRH) analog treatment in girls with EP. A computerized literature search was conducted from 1980 to June 30, 2016. Only published studies in English were considered. Eight papers were selected (483 cases). In untreated girls (n = 300), predicted adult height (PAH) at start of follow-up (-0.559 SDS (95%CI -1.110 to 0.001); P = 0.050) was close to mid-parental height (MPH) (-0.557 SDS (95%CI -0.736 to -0.419); P adult height. What is New: • Untreated and GnRH analog treated girls with early puberty reached similar adult height. • Adult height was consistent with mid-parental height in both untreated and GnRH analog treated girls with early puberty.

  17. Role of basal and provocative serum prolactin in differentiating idiopathic hypogonadotropic hypogonadism and constitutional delayed puberty--a diagnostic dilemma.

    Science.gov (United States)

    Ali, Liaqat; Adeel, Afrose

    2012-01-01

    The prevalence of Idiopathic Hypogonadotropic Hypogonadism (IHH) is approximately 1 in 10,000 men. Objectives of this study were to evaluate the role of basal and stimulated serum prolactin in differentiating Constitutional Delayed Puberty (CDP) from IHH. This cross-sectional study was carried out at the Department of Diabetes and Endocrinology, Military Hospital, Rawalpindi. A total of 20 male patients presenting with provisional diagnosis of IHH/CDP were enrolled in the study. Patients with known diseases were excluded from the study. Baseline FSH, LH, testosterone, and prolactin were estimated and the patients were subjected to provocative prolactin stimulation by Thyrotropin releasing hormone stimulation (TRH) test and chlorpromazine challenge. At each 6 monthly follow-up visit for 4 years, the patients were evaluated for adrenarche, pubarche and other secondary sexual characters. Tanner scale was taken as standards for comparing stage of puberty at a particular age. No treatment was given to both groups for 2 years. At the end of 2 years IHH patients with failed puberty or progression of puberty and CDP who lagged behind by more than 2 years by Tanner scale or 4 years per bone age with compelling psychosocial or psychosexual reasons at school or at home were given short courses of 50 mg injection testosterone in an attempt to expedite the onset or progression of puberty. Patients from either group with failed puberty after low dose testosterone were managed with high dose testosterone therapy to induce secondary sexual characters. Twenty patients enrolled in the study were provisionally divided into 2 groups called IHH (n = 9), and CDP (n = 11) based on high basal and provocative serum prolactin levels in CDP group. Two patients from CDP group were lost in the follow-up leaving 9 patients in each group. A total of 10 (56%) patients, 3 (17%) from IHH group and 7 (39%) from CDP group achieved grade 4 puberty without any treatment. Remaining 8 (44%) patients, 6

  18. Recent decline in age at breast development: the Copenhagen Puberty Study

    DEFF Research Database (Denmark)

    Aksglaede, Lise; Sørensen, Kaspar; Petersen, Jørgen H

    2009-01-01

    cohorts. RESULTS: Onset of puberty, defined as mean estimated age at attainment of glandular breast tissue (Tanner breast stage 2+), occurred significantly earlier in the 2006 cohort (estimated mean age: 9.86 years) when compared with the 1991 cohort (estimated mean age: 10.88 years). The difference...

  19. [Algorithms based on medico-administrative data in the field of endocrine, nutritional and metabolic diseases, especially diabetes].

    Science.gov (United States)

    Fosse-Edorh, S; Rigou, A; Morin, S; Fezeu, L; Mandereau-Bruno, L; Fagot-Campagna, A

    2017-10-01

    Medico-administrative databases represent a very interesting source of information in the field of endocrine, nutritional and metabolic diseases. The objective of this article is to describe the early works of the Redsiam working group in this field. Algorithms developed in France in the field of diabetes, the treatment of dyslipidemia, precocious puberty, and bariatric surgery based on the National Inter-schema Information System on Health Insurance (SNIIRAM) data were identified and described. Three algorithms for identifying people with diabetes are available in France. These algorithms are based either on full insurance coverage for diabetes or on claims of diabetes treatments, or on the combination of these two methods associated with hospitalizations related to diabetes. Each of these algorithms has a different purpose, and the choice should depend on the goal of the study. Algorithms for identifying people treated for dyslipidemia or precocious puberty or who underwent bariatric surgery are also available. Early work from the Redsiam working group in the field of endocrine, nutritional and metabolic diseases produced an inventory of existing algorithms in France, linked with their goals, together with a presentation of their limitations and advantages, providing useful information for the scientific community. This work will continue with discussions about algorithms on the incidence of diabetes in children, thyroidectomy for thyroid nodules, hypothyroidism, hypoparathyroidism, and amyloidosis. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  20. UNESCO's Guidance on Puberty and Sexual Health Education for Students Aged 9-12 Years Compared to an Upper Primary School Curriculum

    Science.gov (United States)

    Goldman, Juliette D. G.

    2015-01-01

    Background: Children and young adolescents are reaching puberty earlier. Providing information about such changes before puberty can help them develop in a more competent and informed manner. Context and Objective: UNESCO's "International Technical Guidance on Sexuality Education" forms a comprehensive, evidence-based, authoritative…

  1. Avaliação histológica dos testículos de ovinos da raça Santa Inês nascidos em diferentes estações do ano Histological evaluation of Santa Ines sheep testicles born in different seasons

    Directory of Open Access Journals (Sweden)

    Concepta McManus

    2010-02-01

    Full Text Available Foram analisados quatro grupos de ovinos machos da raça Santa Inês nascidos em quatro estações do ano, no Distrito Federal, a fim de observar as idades e o peso corporal em que estes atingiram a puberdade. A partir dos cortes histológicos dos testículos, foram analisados parâmetros celulares e mensurações dos túbulos seminíferos. O efeito da data de nascimento sobre os parâmetros avaliados foi significativo (PFour groups of Santa Inês male sheep born in four seasons in the Distrito Federal were analyzed to evaluate the age and body weight at puberty, at which point were castrated. Histological measurements were carried out on the testicles to evaluate cellular parameters and size measurements of the seminiferous tubules. The effect of the group on cellular parameters was significant (P<0.01. Animals born in the dry season were more precocious than the others, but showed the worst histological profile of the testis. The histological traits of the testis of the Santa Inês rams were influenced by the season. The end of the rainy season was shown to the best season for births of sheep in the Central region of Brazil, with histological testicular traits at puberty being superior to the other groups.

  2. Short-Term High-Fat Diet Increases Leptin Activation of CART Neurons and Advances Puberty in Female Mice.

    Science.gov (United States)

    Venancio, Jade Cabestre; Margatho, Lisandra Oliveira; Rorato, Rodrigo; Rosales, Roberta Ribeiro Costa; Debarba, Lucas Kniess; Coletti, Ricardo; Antunes-Rodrigues, Jose; Elias, Carol F; Elias, Lucila Leico K

    2017-11-01

    Leptin is a permissive factor for puberty initiation, participating as a metabolic cue in the activation of the kisspeptin (Kiss1)-gonadotropin-releasing hormone neuronal circuitry; however, it has no direct effect on Kiss1 neurons. Leptin acts on hypothalamic cocaine- and amphetamine-regulated transcript (CART) neurons, participating in the regulation of energy homeostasis. We investigated the influence of a short-term high-fat diet (HFD) on the effect of leptin on puberty timing. Kiss1-hrGFP female mice received a HFD or regular diet (RD) after weaning at postnatal day (PN)21 and were studied at PN28 and PN32. The HFD increased body weight and plasma leptin concentrations and decreased the age at vaginal opening (HFD, 32 ± 0.53 days; RD, 38 ± 0.67 days). Similar colocalization of neurokinin B and dynorphin in Kiss1-hrGFP neurons of the arcuate nucleus (ARC) was observed between the HFD and RD groups. The HFD increased CART expression in the ARC and Kiss1 messenger RNA expression in the anteroventral periventricular (AVPV)/anterior periventricular (Pe). The HFD also increased the number of ARC CART neurons expressing leptin-induced phosphorylated STAT3 (signal transducer and activator of transcription 3) at PN32. Close apposition of CART fibers to Kiss1-hrGFP neurons was observed in the ARC of both RD- and HFD-fed mice. In conclusion, these data reinforce the notion that a HFD increases kisspeptin expression in the AVPV/Pe and advances puberty initiation. Furthermore, we have demonstrated that the HFD-induced earlier puberty is associated with an increase in CART expression in the ARC. Therefore, these data indicate that CART neurons in the ARC can mediate the effect of leptin on Kiss1 neurons in early puberty induced by a HFD. Copyright © 2017 Endocrine Society.

  3. The influence of puberty on vitamin D status in obese children and the possible relation between vitamin D deficiency and insulin resistance.

    Science.gov (United States)

    Gutiérrez Medina, Sonsoles; Gavela-Pérez, Teresa; Domínguez-Garrido, María Nieves; Gutiérrez-Moreno, Elisa; Rovira, Adela; Garcés, Carmen; Soriano-Guillén, Leandro

    2015-01-01

    Puberty can affect vitamin D levels. The goal of this study was to analyze the relation between vitamin D deficiency and puberty in obese Spanish children, along with the possible interrelation between vitamin D status and degree of insulin resistance. A cross-sectional study was carried out, in which clinical and biochemical data were gathered from 120 obese and 50 normal weight children between January 2011 and January 2013. Mean vitamin D levels were 19.5 and 31.6 ng/mL in obese pubertal and obese prepubertal children, respectively. About 75% of the obese pubertal subjects and 46% of the obese prepubertal subjects had vitamin D deficiency. Vitamin D levels were significantly lower in pubescent subjects compared with pre-pubescent subjects in summer, fall, and winter. There was no apparent relation between vitamin D levels and homeostasis model assessment index for insulin resistence (expressed in standard deviation score for sex and Tanner stage) in either puberty or pre-puberty. Puberty may be a risk factor for the vitamin D deficiency commonly found in the obese child population. This deficiency is not associated with higher insulin resistance in obese pubertal children compared with obese prepubertal children.

  4. Some Sociological Contexts for Consideration When Designing a School Puberty/Sexuality Curriculum

    Science.gov (United States)

    Collier-Harris, Christine A.; Goldman, Juliette D. G.

    2017-01-01

    Sociological contexts are key factors in education and schooling. Contemporary contexts of world-view, or "Weltanschauungen," such as human rights, public health, demographics, biosocial factors including earlier puberty and a developmentalist approach, and technological connectivity, warrant significant professional consideration by…

  5. Computed tomography in hypothalamic hamartoma

    International Nuclear Information System (INIS)

    Mori, Koreaki; Takeuchi, Juji; Hanakita, Junya; Handa, Hajime; Nakano, Yoshihisa.

    1981-01-01

    Two cases of hypothalamic hamartoma were reported. Hypothalamic hamartoma is a rate tumor. The onset of symptoms is in infancy and early childhood. Clinical symptoms are composed of convulsive seizures, laughing spells and precocious puberty. CT finding of hypothalamic hamartoma is a mass in the suprasellar and interpeduncular cisterns which has the same density as the surrounding normal brain. The mass is not enhanced by injection of the contrast material and is easily differentiated from other masses in the suprasellar region. (author)

  6. Targeted resequencing of the pericentromere of chromosome 2 linked to constitutional delay of growth and puberty.

    Directory of Open Access Journals (Sweden)

    Diana L Cousminer

    Full Text Available Constitutional delay of growth and puberty (CDGP is the most common cause of pubertal delay. CDGP is defined as the proportion of the normal population who experience pubertal onset at least 2 SD later than the population mean, representing 2.3% of all adolescents. While adolescents with CDGP spontaneously enter puberty, they are at risk for short stature, decreased bone mineral density, and psychosocial problems. Genetic factors contribute heavily to the timing of puberty, but the vast majority of CDGP cases remain biologically unexplained, and there is no definitive test to distinguish CDGP from pathological absence of puberty during adolescence. Recently, we published a study identifying significant linkage between a locus at the pericentromeric region of chromosome 2 (chr 2 and CDGP in Finnish families. To investigate this region for causal variation, we sequenced chr 2 between the genomic coordinates of 79-124 Mb (genome build GRCh37 in the proband and affected parent of the 13 families contributing most to this linkage signal. One gene, DNAH6, harbored 6 protein-altering low-frequency variants (< 6% in the Finnish population in 10 of the CDGP probands. We sequenced an additional 135 unrelated Finnish CDGP subjects and utilized the unique Sequencing Initiative Suomi (SISu population reference exome set to show that while 5 of these variants were present in the CDGP set, they were also present in the Finnish population at similar frequencies. Additional variants in the targeted region could not be prioritized for follow-up, possibly due to gaps in sequencing coverage or lack of functional knowledge of non-genic genomic regions. Thus, despite having a well-characterized sample collection from a genetically homogeneous population with a large population-based reference sequence dataset, we were unable to pinpoint variation in the linked region predisposing delayed puberty. This study highlights the difficulties of detecting genetic variants

  7. Effect of Group Training of Personal Hygiene during Puberty to Mothers on Parent-Child Conflicts and Controlling Over the Emotions of Their Female Adolescents

    OpenAIRE

    Anahita Khodabakhshi-Koolaee; Shahrzad Barghei Khameneh; Marjan Mojarab; Mahnaz Khatiban

    2017-01-01

    Background and Objective: Puberty and adolescence is an important phase of human growth. Puberty leads to a set of physiological, social, and psychological changes in adolescents, which affect different dimensions of their life including parent-child relationship and the control of adolescents’ emotions. This study aimed to determine the impact of group training of personal hygiene during puberty to mothers on parent-child conflicts and controlling over the emotions of the first high school c...

  8. Puberty suppression in gender identity disorder: the Amsterdam experience.

    Science.gov (United States)

    Kreukels, Baudewijntje P C; Cohen-Kettenis, Peggy T

    2011-05-17

    The use of gonadotropin-releasing hormone analogs (GnRHa) to suppress puberty in adolescents with gender dysphoria is a fairly new intervention in the field of gender identity disorders or transsexualism. GnRHa are used to give adolescents time to make balanced decisions on any further treatment steps, and to obtain improved results in the physical appearance of those who opt to continue with sex reassignment. The effects of GnRHa are reversible. However, concerns have been raised about the risk of making the wrong treatment decisions, as gender identity could fluctuate during adolescence, adolescents in general might have poor decision-making abilities, and there are potential adverse effects on health and on psychological and psychosexual functioning. Proponents of puberty suppression emphasize the beneficial effects of GnRHa on the adolescents' mental health, quality of life and of having a physical appearance that makes it possible for the patients to live unobtrusively in their desired gender role. In this Review, we discuss the evidence pertaining to the debate on the effects of GnRHa treatment. From the studies that have been published thus far, it seems that the benefits outweigh the risks. However, more systematic research in this area is needed to determine the safety of this approach.

  9. Effect of a postnatal high-fat diet exposure on puberty onset, estrous cycle regularity, and kisspeptin expression in female rats

    DEFF Research Database (Denmark)

    Lie, Maria Elena Klibo; Overgaard, Agnete; Mikkelsen, Jens D

    2013-01-01

    Kisspeptin, encoded by Kiss1, plays a key role in pubertal maturation and reproduction as a positive upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis. To examine the role of high-fat diet (HFD) on puberty onset, estrous cycle regularity, and kisspeptin expression, female rats...... were exposed to HFD in distinct postnatal periods. Three groups of rats were exposed to HFD containing 60% energy from fat during the pre-weaning period (postnatal day (PND) 1-16, HFD PND 1-16), post-weaning period (HFD PND 21-34), or during both periods (HFD PND 1-34). Puberty onset, evaluated...... that postnatal HFD exposure induced irregular estrous cycles, but had no effect on puberty onset or kisspeptin....

  10. Combined Treatment with Gonadotropin-releasing Hormone Analog and Anabolic Steroid Hormone Increased Pubertal Height Gain and Adult Height in Boys with Early Puberty for Height.

    Science.gov (United States)

    Tanaka, Toshiaki; Naiki, Yasuhiro; Horikawa, Reiko

    2012-04-01

    Twenty-one boys with a height of 135 cm or less at onset of puberty were treated with a combination of GnRH analog and anabolic steroid hormone, and their pubertal height gain and adult height were compared with those of untreated 29 boys who enter puberty below 135 cm. The mean age at the start of treatment with a GnRH analog, leuprorelin acetate depot (Leuplin(®)) was 12.3 yr, a mean of 1.3 yr after the onset of puberty, and GnRH analog was administered every 3 to 5 wk thereafter for a mean duration of 4.1 yr. The anabolic steroid hormone was started approximately 1 yr after initiation of treatment with the GnRH analog. The mean pubertal height gain from onset of puberty till adult height was significantly greater in the combination treatment group (33.9 cm) than in the untreated group (26.4 cm) (ppenis and pubic hair is promoted by the anabolic steroid hormone, no psychosocial problems arose because of delayed puberty. No clinically significant adverse events appeared. Combined treatment with GnRH analog and anabolic steroid hormone significantly increased height gain during puberty and adult height in boys who entered puberty with a short stature, since the period until epiphyseal closure was extended due to deceleration of the bone age maturation by administration of the GnRH analog and the growth rate at this time was maintained by the anabolic steroid hormone.

  11. Clinical review: Distinguishing constitutional delay of growth and puberty from isolated hypogonadotropic hypogonadism: critical appraisal of available diagnostic tests.

    Science.gov (United States)

    Harrington, Jennifer; Palmert, Mark R

    2012-09-01

    Determining the etiology of delayed puberty during initial evaluation can be challenging. Specifically, clinicians often cannot distinguish constitutional delay of growth and puberty (CDGP) from isolated hypogonadotropic hypogonadism (IHH), with definitive diagnosis of IHH awaiting lack of spontaneous puberty by age 18 yr. However, the ability to make a timely, correct diagnosis has important clinical implications. The aim was to describe and evaluate the literature regarding the ability of diagnostic tests to distinguish CDGP from IHH. A PubMed search was performed using key words "puberty, delayed" and "hypogonadotropic hypogonadism," and citations within retrieved articles were reviewed to identify studies that assessed the utility of basal and stimulation tests in the diagnosis of delayed puberty. Emphasis was given to a test's ability to distinguish prepubertal adolescents with CDGP from those with IHH. Basal gonadotropin and GnRH stimulation tests have limited diagnostic specificity, with overlap in gonadotropin levels between adolescents with CDGP and IHH. Stimulation tests using more potent GnRH agonists and/or human chorionic gonadotropin may have better discriminatory value, but small study size, lack of replication of diagnostic thresholds, and prolonged protocols limit clinical application. A single inhibin B level in two recent studies demonstrated good differentiation between groups. Distinguishing IHH from CDGP is an important clinical issue. Basal inhibin B may offer a simple, discriminatory test if results from recent studies are replicated. However, current literature does not allow for recommendation of any diagnostic test for routine clinical use, making this an important area for future investigation.

  12. The influence of stress at puberty on mood and learning: Role of the α4βδ GABAA receptor

    Science.gov (United States)

    Smith, Sheryl S.

    2012-01-01

    It is well-known that the onset of puberty is associated with changes in mood as well as cognition. Stress can have an impact on these outcomes, which in many cases, can be more influential in females, suggesting that gender differences exist. The adolescent period is a vulnerable time for the onset of certain psychopathologies, including anxiety disorders, depression and eating disorders, which are also more prevalent in females. One factor which may contribute to stress-triggered anxiety at puberty is the GABAA receptor (GABAR), which is known to play a pivotal role in anxiety. Expression of α4βδ GABARs increases on the dendrites of CA1 pyramidal cells at the onset of puberty in the hippocampus, part of the limbic circuitry which governs emotion. This receptor is a sensitive target for the stress steroid THP (3α-OH-5[α]β-pregnan-20-one), which paradoxically reduces inhibition and increases anxiety during the pubertal period (~PND 35–44) of female mice in contrast to its usual effect to enhance inhibition and reduce anxiety. Spatial learning and synaptic plasticity are also adversely impacted at puberty, likely a result of increased expression of α4βδ GABARs on the dendritic spines of CA1 hippocampal pyramidal cells, which are essential for consolidation of memory. This review will focus on the role of these receptors in mediating behavioral changes at puberty. Stress-mediated changes in mood and cognition in early adolescence may have relevance for the expression of psychopathologies in adulthood. PMID:23079628

  13. Dentofacial growth changes in subjects with untreated Class II malocclusion from late puberty through young adulthood.

    Science.gov (United States)

    Baccetti, Tiziano; Stahl, Franka; McNamara, James A

    2009-02-01

    The purpose of this longitudinal study was to compare dentofacial growth changes in untreated subjects with Class II Division 1 malocclusion with those in subjects with normal (Class I) occlusion from late puberty through young adulthood. The Class II Division 1 sample consisted of 23 subjects (10 male, 13 female). The Class I sample included 30 subjects (13 male, 17 female). The lateral cephalograms of the subjects in both groups were analyzed at 2 consecutive stages of development: T1, postpubertal observation (cervical vertebral maturation stage 6), and T2, young adulthood stage. The average time between T1 and T2 was 3.5 years. The statistical comparisons of the growth changes in the 2 groups were performed with Mann-Whitney U tests. From late puberty through young adulthood, dentofacial growth in subjects with untreated Class II malocclusion does not show significant differences when compared with that observed in untreated subjects with normal occlusion. These findings show that Class II dentoskeletal disharmony does not exhibit significant growth change from late puberty through young adulthood.

  14. Effect of extended photoperiod during winter on growth and onset of puberty in Murrah buffalo heifers

    Directory of Open Access Journals (Sweden)

    Ashwani Kumar Roy

    2016-02-01

    Full Text Available Aim: To investigate the effect of extended photoperiod on growth rate, hormonal levels, and puberty in Murrah heifers. Materials and Methods: About 14 Murrah buffalo heifers were divided into normal day photoperiod (NDP; n=7 and extended NDP (ENDP; n=7 groups. The ENDP group was exposed to 4 h of extended photoperiod with artificial light (160 lux after sunset for 3 months during winter. Results: Group, age and group-by-age interaction effects on plasma glucose concentrations were non-significant (p>0.05. A significant effect of age on non-esterified fatty acids (p0.05 while significant (p0.05. Average daily gain and dry matter intake of heifers were nonsignificant between the NDP and ENDP groups but were comparatively higher in ENDP group. By the end of the experiment, 6 out of 7 heifers attained puberty in ENDP group in comparison to 4 out of 7 in NDP group. Conclusion: Extending the photoperiod by artificial light for 4 h during winter season resulted in better growth rate and early onset of puberty in Murrah buffalo heifers.

  15. Activity cycles and foraging behaviors of free-ranging sidewinder rattlesnakes (Crotalus cerastes): the ontogeny of hunting in a precocial vertebrate.

    Science.gov (United States)

    Clark, Rulon W; Dorr, Scott W; Whitford, Malachi D; Freymiller, Grace A; Putman, Breanna J

    2016-06-01

    Predators often employ a complex series of behaviors to overcome antipredator defenses and effectively capture prey. Although hunting behaviors can improve with age and experience, many precocial species are necessarily effective predators from birth. Additionally, many predators experience innate ontogenetic shifts in predatory strategies as they grow, allowing them to adapt to prey more appropriate for their increased size and energetic needs. Understanding how the relative roles of innate age-specific adaptation and learning have evolved requires information on how predation behavior develops in situ, in free-ranging predators. However, most of the research on the ontogeny of predation behavior is based on laboratory studies of captive animals, largely due to the difficulty of following newborn individuals in nature. Here, we take advantage of the unique tracks left by juveniles of a precocial viperid, the sidewinder rattlesnake (Crotalus cerastes), which we used to follow free-ranging snakes in the field. We recorded details of their ambush hunting behavior, and compared the behaviors of these juveniles to adult snakes that we monitored in the field via radio telemetry. Although juvenile and adult behaviors were similar in most respects, we did find that adults chose more effective ambush sites, which may be due to their increased experience. We also found that juveniles (but typically not adults) perform periodic tail undulations while in ambush, and that juveniles displayed slightly different activity cycles. Both of these latter differences are likely the result of age-specific adaptations for juveniles' greater reliance on lizards versus small mammals as prey. We also compared the general predatory behavior of sidewinders to that of other species in the genus Crotalus. These findings will provide important baseline field information for more detailed empirical research on the ontogeny of predation behavior in precocial vertebrates. Copyright © 2016

  16. The timing of normal puberty and the age limits of sexual precocity

    DEFF Research Database (Denmark)

    Parent, Anne-Simone; Teilmann, Grete; Juul, Anders

    2003-01-01

    During the past decade, possible advancement in timing of puberty has been reported in the United States. In addition, early pubertal development and an increased incidence of sexual precocity have been noticed in children, primarily girls, migrating for foreign adoption in several Western European...

  17. The timing of normal puberty and the age limits of sexual precocity

    DEFF Research Database (Denmark)

    Parent, Anne-Simone; Teilmann, Grete; Juul, Anders

    2003-01-01

    During the past decade, possible advancement in timing of puberty has been reported in the United States. In addition, early pubertal development and an increased incidence of sexual precocity have been noticed in children, primarily girls, migrating for foreign adoption in several Western Europe...

  18. Antral follicular count is a tool that allows the selection of more precocious animals at weaning

    Science.gov (United States)

    Lifetime productivity and longevity are greater in those beef cows that give birth early in their first calving season. This is why age at puberty and first calving affect the reproductive performance of breeding cows during the remainder of their productive life. Recent evidence suggests that antra...

  19. Pubertal administration of DEHP delays puberty, suppresses testosterone production and inhibits reproductive tract development in male Sprague-Dawley and Long-Evans Rats

    Science.gov (United States)

    While is clear that exposure to high dosage levels of some phthalates delays the onset of puberty in the male rat it has been hypothesized that low levels of DEHP accelerate puberty by enhancing testicular androgen synthesis. The current study was designed to determine if the do...

  20. Endocrine profiles during attainment of puberty may predict reproductive longevity in heifers

    Science.gov (United States)

    We hypothesized that attainment of puberty through initiation and continuation of cyclic activity may be a predictor of reproductive longevity in heifers. Blood plasma was collected from 379 spring born heifers over four years from weaning to prior to breeding (October-June) in 2012-2015. Four pube...

  1. The Effect of Puberty Education on Knowledge, Attitude and Function of Girl's Students

    Directory of Open Access Journals (Sweden)

    Shahrban Mehrabi

    2016-07-01

    Full Text Available Introduction: The study was examined effect of puberty education on knowledge, attitude and function in girl's student in Jiroft. Materials & Methods: this was a quasi experimental study and the target population was girl's student at grade 1 high school in jiroft city and 40 girls were selected and were educated in a 12 sessions. The content of the educational course including physical signs of puberty, physiologic change in menstrual period, nutrition, sleep and psychological changes. The subjects completed in pretest and posttest a researcher made questionnaire that measure knowledge, attitude and function. The data was analyzed using descriptive indexes, t- and F-tests. The significant level was considered in less than 0.05. Results: The results showed that the average difference between pre-test and post-test knowledge, attitude and function in both experimental and control groups was significant (p

  2. Breast Cancer Lymphatic Dissemination-Influence of Estrogen and Progesterone

    Science.gov (United States)

    2007-03-01

    1.6) .1 (.7) 3 (.007 .0 (.6)b .3 (1.7) .8 (.7)a 6 (.007urthermore, hypothyroidism is in differential diagnosis w i t w e fi s m R d P G a A F o t p d G...and leuprolide acetate treatment for uterine leiomy- ma, endometriosis, or precocious puberty [15–20]. Most of hese case reports were adult females...The effect of gonadotropin-releasing hormone agonist on thyroid-stimulating hormone and prolactin secretion in adult premenopausal women. Fertil Steril

  3. Recurrent ovarian Sertoli?Leydig cell tumor in a child with Peutz?Jeghers syndrome

    OpenAIRE

    Bellfield, Edward J.; Alemzadeh, Ramin

    2016-01-01

    We present a female child with Peutz?Jeghers syndrome (PJS) with a recurrent ovarian Sertoli?Leydig cell tumor (SLCT). SLCTs are relatively rare sex cord neoplasms that can occur in PJS. The patient was an African-American female who first presented at the age of 3 years with precocious puberty, and then at the age of 17 years with abdominal pain and irregular menses. In each case, she had resection of the mass, which included oophorectomy. To our knowledge, this is the first reported case in...

  4. Metabolic cues for puberty onset in free grazing Holstein heifers naturally infected with nematodes.

    Science.gov (United States)

    Díaz-Torga, G S; Mejia, M E; González-Iglesias, A; Formia, N; Becú-Villalobos, D; Lacau-Mengido, I M

    2001-07-01

    Leptin is a new plausible candidate for the molecular link between nutritional status and the reproductive axis. In previous studies we described that continuous natural nematode infections in heifers retarded growth and delayed the onset of puberty, and that the insulin-like growth factor I (IGF-I) was involved. In the present study we monitored the leptin levels during development in heifers naturally parasitized versus those chronically treated with ivermectin and we investigated whether growth hormone (GH) accounted for the differences in IGF-I previously noted. Insulin levels were also measured. Prolactin hormone was recorded as an indicator of immune system activation. We found a direct correlation between leptin and body weight during development and a prepubertal surge of the hormone 2 weeks before the first progesterone peak that indicates the onset of puberty. This suggests that leptin may act as a signal for this event. Insulin did not vary during growth and prepuberty. On the other hand, GH as not responsible for diminished IGF-I levels in parasitized animals as levels were similar in both groups. The GH levels were high at birth and then diminished rapidly and remained constant during development and puberty. The last hormone studied, prolactin, followed seasonal changes of sunlight duration and presented sporadic bursts in infected animals. These were related to high nematode infection and are probably involved in the immune response of the host.

  5. Delayed puberty, eroticism, and sense of smell: A psychological study of hypogonadotropinism, osmatic and anosmatic (Kallmann's syndrome).

    Science.gov (United States)

    Bobrow, N A; Money, J; Lewis, V G

    1971-12-01

    In 13 male patients with a diagnosis of hypogonadotropic hypogonadism, associated in five cases with verified hyposmia (Kallmann's syndrome), social development and participation were delayed. The patients associated the lack of visible signs of male puberty with their delayed sociosexual maturation. However, the evidence of physical maturation after treatment did not have the ameliorative effect on their social behavior one would have liked to predict. Dating behavior was limited before and after treatment for all the patients, and sexual interest was low even for the three married ones. The experience of falling in love was notably absent in the relationships described. Two characteristic social reaction patterns were social introversion and hostile rejection of agemates. Intellectual functioning and the incidence of personality pathology were not diagnostically noteworthy. None of the patients had any problems with gender identity except for erotic apathy which extended to masturbation. There was an absence of homosexuality. Possibly hypogonadotropic patients have a primary defect of the hypothalamus, manifesting itself as a dysfunction of the behavioral concomitants of puberty as well as a failure of hormonal puberty.

  6. Delayed puberty but normal fertility in mice with selective deletion of insulin receptors from Kiss1 cells.

    Science.gov (United States)

    Qiu, Xiaoliang; Dowling, Abigail R; Marino, Joseph S; Faulkner, Latrice D; Bryant, Benjamin; Brüning, Jens C; Elias, Carol F; Hill, Jennifer W

    2013-03-01

    Pubertal onset only occurs in a favorable, anabolic hormonal environment. The neuropeptide kisspeptin, encoded by the Kiss1 gene, modifies GnRH neuronal activity to initiate puberty and maintain fertility, but the factors that regulate Kiss1 neurons and permit pubertal maturation remain to be clarified. The anabolic factor insulin may signal nutritional status to these neurons. To determine whether insulin sensing plays an important role in Kiss1 neuron function, we generated mice lacking insulin receptors in Kiss1 neurons (IR(ΔKiss) mice). IR(ΔKiss) females showed a delay in vaginal opening and in first estrus, whereas IR(ΔKiss) males also exhibited late sexual maturation. Correspondingly, LH levels in IR(ΔKiss) mice were reduced in early puberty in both sexes. Adult reproductive capacity, body weight, fat composition, food intake, and glucose regulation were comparable between the 2 groups. These data suggest that impaired insulin sensing by Kiss1 neurons delays the initiation of puberty but does not affect adult fertility. These studies provide insight into the mechanisms regulating pubertal timing in anabolic states.

  7. [Adolescent crises in puberty. Diagnosis and therapy (author's transl)].

    Science.gov (United States)

    Müller-Küppers, M

    1979-08-24

    Psychological disorders which become manifest as adolescent crises must be seen as complex phenomena and treated thoroughly: besides the genetic, biographic and psychosocial background of the youthful individual the cultural and economic aspects play an important role. Nevertheless we must admit that associated causal explanations, e.g. for accelerated or late development are lacking. Focal points for the subsequent symptom complexes of sexual behavior in puberty are: psychosexual prematurity or retardation, masturbation, homosexual relations, pubertal asceticism and premature and frequently changing sexual relations.

  8. Precocious development of self-awareness in dolphins.

    Directory of Open Access Journals (Sweden)

    Rachel Morrison

    Full Text Available Mirror-self recognition (MSR is a behavioral indicator of self-awareness in young children and only a few other species, including the great apes, dolphins, elephants and magpies. The emergence of self-awareness in children typically occurs during the second year and has been correlated with sensorimotor development and growing social and self-awareness. Comparative studies of MSR in chimpanzees report that the onset of this ability occurs between 2 years 4 months and 3 years 9 months of age. Studies of wild and captive bottlenose dolphins (Tursiops truncatus have reported precocious sensorimotor and social awareness during the first weeks of life, but no comparative MSR research has been conducted with this species. We exposed two young bottlenose dolphins to an underwater mirror and analyzed video recordings of their behavioral responses over a 3-year period. Here we report that both dolphins exhibited MSR, indicated by self-directed behavior at the mirror, at ages earlier than generally reported for children and at ages much earlier than reported for chimpanzees. The early onset of MSR in young dolphins occurs in parallel with their advanced sensorimotor development, complex and reciprocal social interactions, and growing social awareness. Both dolphins passed subsequent mark tests at ages comparable with children. Thus, our findings indicate that dolphins exhibit self-awareness at a mirror at a younger age than previously reported for children or other species tested.

  9. MINOR NEUROLOGICAL DYSFUNCTION AFTER THE ONSET OF PUBERTY - ASSOCIATION WITH PERINATAL EVENTS

    NARCIS (Netherlands)

    SOORANILUNSING, RJ; HADDERSALGRA, M; HUISJES, HJ; TOUWEN, BCL

    In order to study the hypotheses that puberty is related to a decrease of minor neurological dysfunction (MND) and that persisting MND is associated with perinatal factors, two groups (174 normal, 172 MND) of the Groningen Perinatal Project were followed from 12 to 14 years. At 14 years almost all

  10. Perceptions of Sex, Gender, and Puberty Suppression: A Qualitative Analysis of Transgender Youth

    NARCIS (Netherlands)

    Vrouenraets, L.J.; Fredriks, A.M.; Hannema, S.E.; Cohen-Kettenis, P.T.; Vries, M.C. de

    2016-01-01

    International guidelines recommend the use of Gonadotropin-Releasing Hormone (GnRH) agonists in adolescents with gender dysphoria (GD) to suppress puberty. Little is known about the way gender dysphoric adolescents themselves think about this early medical intervention. The purpose of the present

  11. A rare presentation of craniopharyngioma: delayed puberty

    Science.gov (United States)

    İnci, Mehmet Fatih; Özkan, Fuat; Bozkurt, Selim; Demir, Caner Feyzi

    2012-01-01

    Craniopharyngiomas are the most frequently encountered suprasellar tumours in children. Owing to the slow growth rate of these tumours, they are often quite large before becoming symptomatic. They are more common among children and older adults (55–74 years). Depending upon the direction of growth and tumour size, craniopharyngiomas can affect the hypothalamus, pituitary stalk, optic nerves and chiasm and carotid arteries. Compression of these neural and vascular structures frequently precipitates endocrine disorders, visual loss and an increased intracranial pressure. Hypopituitarism leading to a delayed puberty is a rare presentation of craniopharyngioma. The diagnosis of craniopharyngioma is usually made with the classic radiological imaging features based on CT and MRI. PMID:23195827

  12. Neonatal screening and a new cause of congenital central hypothyroidism

    Directory of Open Access Journals (Sweden)

    Toshihiro Tajima

    2014-09-01

    Full Text Available Congenital central hypothyroidism (C-CH is a rare disease in which thyroid hormone deficiency is caused by insufficient thyrotropin (TSH stimulation of a normally-located thyroid gland. Most patients with C-CH have low free thyroxine levels and inappropriately low or normal TSH levels, although a few have slightly elevated TSH levels. Autosomal recessive TSH deficiency and thyrotropin-releasing hormone receptor-inactivating mutations are known to be genetic causes of C-CH presenting in the absence of other syndromes. Recently, deficiency of the immunoglobulin superfamily member 1 (IGSF1 has also been demonstrated to cause C-CH. IGSF1 is a plasma membrane glycoprotein highly expressed in the pituitary. Its physiological role in humans remains unknown. IGSF1 deficiency causes TSH deficiency, leading to hypothyroidism. In addition, approximately 60% of patients also suffer a prolactin deficiency. Moreover, macroorchidism and delayed puberty are characteristic features. Thus, although the precise pathophysiology of IGSF1 deficiency is not established, IGSF1 is considered to be a new factor controlling growth and puberty in children.

  13. The sex‐shift in single disease and multimorbid asthma and rhinitis during puberty

    DEFF Research Database (Denmark)

    Keller, Theresa; Hohmann, C; Standl, M

    2018-01-01

    BACKGROUND: Cross-sectional studies suggested that allergy prevalence in childhood is higher in boys compared to girls, but it remains unclear if this inequality changes after puberty. We examined the sex-specific prevalence of asthma and rhinitis as single and as multimorbid diseases before...

  14. The sex-shift in single disease and multimorbid asthma and rhinitis during puberty

    DEFF Research Database (Denmark)

    Keller, Theresa; Hohmann, C; Standl, M

    2018-01-01

    BACKGROUND: Cross-sectional studies suggested that allergy prevalence in childhood is higher in boys compared to girls, but it remains unclear if this inequality changes after puberty. We examined the sex-specific prevalence of asthma and rhinitis as single and as multimorbid diseases before and ...

  15. Within-person changes in salivary testosterone and physical characteristics of puberty predict boys' daily affect.

    Science.gov (United States)

    Klipker, Kathrin; Wrzus, Cornelia; Rauers, Antje; Boker, Steven M; Riediger, Michaela

    2017-09-01

    Recent investigations highlighted the role of within-person pubertal changes for adolescents' behavior. Yet, little is known about effects on adolescents' daily affect, particularly regarding the hormonal changes underlying physical changes during puberty. In a study with 148 boys aged 10 to 20years, we tested whether within-person physical and hormonal changes over eight months predicted everyday affect fluctuations, measured with experience sampling. As expected, greater within-person changes in testosterone (but not in dehydroepiandrosterone) were associated with higher affect fluctuations in daily life. Additionally, greater physical changes predicted higher affect fluctuations for individuals in the beginning of puberty. The findings demonstrate the relevance of physical and hormonal changes in boys' affective (in)stability. Copyright © 2017 Elsevier Inc. All rights reserved.

  16. A seasonal variation of calcitropic hormones, bone turnover and bone mineral density in early and mid-puberty girls - a cross-sectional study

    DEFF Research Database (Denmark)

    Viljakainen, H.T.; Palssa, A.; Karkkainen, M.

    2006-01-01

    -six girls, mean age 11 center dot 4 (sd 0 center dot 4) years, in Tanner stage 2 (early puberty) and 3 (mid-puberty) were studied during September to March. The BMD was measured from the lumbar vertebrae and the left femur by dual-energy X-ray absoptiometry. Their serum 25-hydroxyvitamin D (S-25-OHD), serum...

  17. Puberty suppression in adolescents with gender identity disorder: a prospective follow-up study

    NARCIS (Netherlands)

    de Vries, A.L.C.; Steensma, T.D.; Doreleijers, T.A.H.; Cohen-Kettenis, P.T.

    2011-01-01

    Introduction. Puberty suppression by means of gonadotropin-releasing hormone analogues (GnRHa) is used for young transsexuals between 12 and 16 years of age. The purpose of this intervention is to relieve the suffering caused by the development of secondary sex characteristics and to provide time to

  18. HYPERANDROGENISM OF PUBERTY AGE AS A FACTOR REDUCING FERTILITY

    Directory of Open Access Journals (Sweden)

    E. M. Bogatyreva

    2016-01-01

    Full Text Available Aim. Hyperandrogenism is a common cause of infertility in women. The onset of symptoms of hyperandrogenism takes place during puberty in the majority of women. Hyperandrogenism reduces reproductive potential,so early detection and development of its prognostic factors, allows us to solve serious problems of puberty and prevent infertility.Materials and methods. 113 adolescent girls with hyperandrogenism from 14 to 19 years were included. The control group consists of 25 healthy girls of a similar age. To confirm the prediction of decreased reproductive capacity were examined 35 women with hyperandrogenism from 19 to 36 years. In addition to routine methods of examination (anamnesis, physical examination, anthropometry, assessment of the hairline using Ferriman – Gallwey scale, ultrasound of the pelvic organs, the definition of the hormonal status (LH, FSH, prolactin, 17-OHP, estradiol, TSH, DHEAS-s, GHPG, testosterone, glucose, insulin, glucose tolerance test and dexamethasone suppression test when necessary.Results. We have proved the reduction of reproductive potential of adolescent girls with high free androgen index (FAI. When the FAI has increased from 36 to 100 conventional units it caused reduction of the reproductive capacity in 9.7 times in comparison with control group (χ2=56,24; p < 0.001; overall prediction accuracy of 92.8%.Conclusion. Free androgen index more than 36 conventional units is a high risk factor of reduced fertility.

  19. RNAi-mediated silencing of vitellogenin gene function turns honeybee ( Apis mellifera) workers into extremely precocious foragers

    Science.gov (United States)

    Marco Antonio, David Santos; Guidugli-Lazzarini, Karina Rosa; Do Nascimento, Adriana Mendes; Simões, Zilá Luz Paulino; Hartfelder, Klaus

    2008-10-01

    The switch from within-hive activities to foraging behavior is a major transition in the life cycle of a honeybee ( Apis mellifera) worker. A prominent regulatory role in this switch has long been attributed to juvenile hormone (JH), but recent evidence also points to the yolk precursor protein vitellogenin as a major player in behavioral development. In the present study, we injected vitellogenin double-stranded RNA (dsVg) into newly emerged worker bees of Africanized genetic origin and introduced them together with controls into observation hives to record flight behavior. RNA interference-mediated silencing of vitellogenin gene function shifted the onset of long-duration flights (>10 min) to earlier in life (by 3 4 days) when compared with sham and untreated control bees. In fact, dsVg bees were observed conducting such flights extremely precociously, when only 3 days old. Short-duration flights (<10 min), which bees usually perform for orientation and cleaning, were not affected. Additionally, we found that the JH titer in dsVg bees collected after 7 days was not significantly different from the controls. The finding that depletion of the vitellogenin titer can drive young bees to become extremely precocious foragers could imply that vitellogenin is the primary switch signal. At this young age, downregulation of vitellogenin gene activity apparently had little effect on the JH titer. As this unexpected finding stands in contrast with previous results on the vitellogenin/JH interaction at a later age, when bees normally become foragers, we propose a three-step sequence in the constellation of physiological parameters underlying behavioral development.

  20. Puberty suppression and executive functioning : An fMRI-study in adolescents with gender dysphoria

    NARCIS (Netherlands)

    Staphorsius, Annemieke S; Kreukels, Baudewijntje P C; Cohen-Kettenis, Peggy T; Veltman, Dick J; Burke, Sarah M; Schagen, Sebastian E E; Wouters, Femke M; Delemarre-van de Waal, Henriëtte A; Bakker, J.

    Adolescents with gender dysphoria (GD) may be treated with gonadotropin releasing hormone analogs (GnRHa) to suppress puberty and, thus, the development of (unwanted) secondary sex characteristics. Since adolescence marks an important period for the development of executive functioning (EF), we

  1. Puberty suppression and executive functioning: An fMRI-study in adolescents with gender dysphoria

    NARCIS (Netherlands)

    Staphorsius, A.S.; Kreukels, B.P.C.; Cohen-Kettenis, P.T.; Veltman, D.J.; Burke, S.M.; Schagen, S.E.E.; Wouters, F.M.; Delemarre-van de Waal, H.A.; Bakker, J.

    2015-01-01

    Adolescents with gender dysphoria (GD) may be treated with gonadotropin releasing hormone analogs (GnRHa) to suppress puberty and, thus, the development of (unwanted) secondary sex characteristics. Since adolescence marks an important period for the development of executive functioning (EF), we

  2. Timing and rate of spheno-occipital synchondrosis closure and its relationship to puberty

    Science.gov (United States)

    Vargas, Eduardo; Palomo, J. Martin; Hans, Mark; Latimer, Bruce; Simpson, Scott

    2017-01-01

    Objectives This study examines the relationship between spheno-occipital synchondrosis (SOS) closure and puberty onset in a modern American population. It also investigates the timing and the rate of SOS closure in males and females. Materials and methods The sample includes cross-sectional and longitudinal 3D Cone Beam Computed Tomography (CBCT) scans of 741 individuals (361 males and 380 females) aged 6–20 years. Each CBCT scan is visualized in the mid-sagittal plane, and the spheno-occipital synchondrosis (SOS) is scored as completely open, partially fused, mostly fused, and completely fused. The Menarche commencement is used as an indicator of puberty onset in females. Results Mean ages of open, partially-fused, mostly-fused, and completely fused SOS were 11.07, 12.95, 14.44, and 16.41 years in males, and 9.75, 11.67, 13.25, and 15.25 in females, respectively. The results show there is a significant association between the SOS closure stage and the commencement of menarche (Fisher's Exact Test p < 0.001). It was found that females had a higher SOS closure rate (38.60%) per year than males at the age of 10 years. The closure rate in males appears slower than females at age 10, but it lasts a longer time, ranging between 22 and 26% per year from age 11 to 14 years. Conclusion There is a significant relationship between puberty onset and SOS closure, suggesting its closure is at least partially affected by systemic, hormonal changes in the growing adolescent. Also, SOS closure occurs at a faster rate and at an earlier age in females compared to males. PMID:28827837

  3. MRI study of normal pituitary glands in stage of puberty

    International Nuclear Information System (INIS)

    Lin Guangwu; Zhang Tao; Yang Ning; Cai Feng; Shi Yifan; Deng Jieying; Zhang Luodong; Jiang Yayun

    2005-01-01

    Objective: To study the changes of shape, size and signal intensity of normal pituitary glands in adolescents and to correlate the size and shape of normal pituitary glands with the age, height and weight in stage of puberty. Methods: One hundred and fifty-five cases of MRI data of pituitary glands in normal adolescents range from 6.0 year to 18.9 year were used. Using high-field 1.5T MR scanner, the appearances of pituitary glands in 152 normal adolescents were analyzed on T 1 WI in standard median sagittal and coronal plane. Results: Three groups quantitative data of size, shape and single intensity changes of normal pituitary glands were obtained, which were divided into 6- m =0.74, t=3.624, P=0.004; r f =0.94, t=9.562, P=0.000), however, it was not markedly correlated with the height and weight (P>0.05). Conclusion: Obvious changes of the size and shape of pituitary glands were found in health adolescents. The pituitary glands manifest physiologic hypertrophy with more convex of upper border when age increased in stage of puberty. The spherical appearance of the pituitary glands is a normal developmental feature and should not warrant clinical investigation for the presence of an underlying micro-adenoma in teenage females. (authors)

  4. Combined Treatment with Gonadotropin-releasing Hormone Analog and Anabolic Steroid Hormone Increased Pubertal Height Gain and Adult Height in Boys with Early Puberty for Height

    OpenAIRE

    Tanaka, Toshiaki; Naiki, Yasuhiro; Horikawa, Reiko

    2012-01-01

    Twenty-one boys with a height of 135 cm or less at onset of puberty were treated with a combination of GnRH analog and anabolic steroid hormone, and their pubertal height gain and adult height were compared with those of untreated 29 boys who enter puberty below 135 cm. The mean age at the start of treatment with a GnRH analog, leuprorelin acetate depot (Leuplin?) was 12.3 yr, a mean of 1.3 yr after the onset of puberty, and GnRH analog was administered every 3 to 5 wk thereafter for a mean d...

  5. Examination of US puberty-timing data from 1940 to 1994 for secular trends

    DEFF Research Database (Denmark)

    Euling, Susan Y; Herman-Giddens, Marcia E; Lee, Peter A

    2008-01-01

    different methods. As a result, conclusions from data comparisons have not been consistent. An expert panel was asked to evaluate the weight of evidence for whether the data, collected from 1940 to 1994, are sufficient to suggest or establish a secular trend in the timing of puberty markers in US boys...

  6. Hormonal regulation of puberty onset in female rats: is leptin a missing link?

    NARCIS (Netherlands)

    Zeinoaldini, S.

    2005-01-01

    Numerous factors in the hypothalamus-pituitary-gonadal axis (HPG) are involved in the timing of puberty onset.Leptin signals the nutritional status and the presence of an adequate amount of loaded adipose tissue, as a long-term

  7. Learning about facts of life: perspective from medical students on sources and preferences about puberty and sex education in Karachi.

    Science.gov (United States)

    Shaikh, Masood Ali; Mubeen, Syed Muhammand; Furqan, Muhammad

    2017-11-01

    Puberty heralds the onset of adulthood, and is fraught with complex physiological and psychological changes and emotions. In this study, we looked at the sources of information about puberty and sex education among males and females, age at which they learned about them, and the opinions on the role of schools and parents in imparting this education among medical students.A cross-sectional pilot study, using convenience sampling was conducted among 153 medical students of the Hamdard College of Medicine and Dentistry (HCM&D) in Karachi. Regarding most common source of information about puberty; 23 (25.3%) males identified friends as the most important source of information. While 31 (50.0%) women identified their mothers as the most important source.Regarding most common source of information about reproductive systems and sex; 17 (27.4%) women identified school teachers as the most common source of information, while 26 (28.6%) men identified books and magazines.

  8. Estimating volumes of the pituitary gland from T1-weighted magnetic-resonance images: effects of age, puberty, testosterone, and estradiol.

    Science.gov (United States)

    Wong, Angelita Pui-Yee; Pipitone, Jon; Park, Min Tae M; Dickie, Erin W; Leonard, Gabriel; Perron, Michel; Pike, Bruce G; Richer, Louis; Veillette, Suzanne; Chakravarty, M Mallar; Pausova, Zdenka; Paus, Tomáš

    2014-07-01

    The pituitary gland is a key structure in the hypothalamic-pituitary-gonadal (HPG) axis--it plays an important role in sexual maturation during puberty. Despite its small size, its volume can be quantified using magnetic resonance imaging (MRI). Here, we study a cohort of 962 typically developing adolescents from the Saguenay Youth Study and estimate pituitary volumes using a newly developed multi-atlas segmentation method known as the MAGeT Brain algorithm. We found that age and puberty stage (controlled for age) each predicts adjusted pituitary volumes (controlled for total brain volume) in both males and females. Controlling for the effects of age and puberty stage, total testosterone and estradiol levels also predict adjusted pituitary volumes in males and pre-menarche females, respectively. These findings demonstrate that the pituitary gland grows during adolescence, and its volume relates to circulating plasma-levels of sex steroids in both males and females. Copyright © 2014 Elsevier Inc. All rights reserved.

  9. Ideologies of sexuality, menstruation and risk: girls' experiences of puberty and schooling in northern Tanzania.

    Science.gov (United States)

    Sommer, Marni

    2009-05-01

    This paper examines girls' voiced experiences of menstruation, puberty and schooling in northern Tanzania. The study was conducted in Moshi and Rombo Districts of Kilimanjaro, a predominantly Chagga region with historically strong support for girls' education. The major question explored was how the onset of menses and puberty may be impacting on girls' school participation, given societal implications of pubertal onset and potentially gender discriminatory school environments. The methodology included a comparative case study using in-depth interviews and participatory research with young women living in urban and rural Kilimanjaro. Along with important findings about how menstrual onset creates challenges for girls attending school emerged findings about the significant gaps in girls' knowledge about body changes, sexual health and HIV/AIDS. These findings underline the importance of identifying new girl-centred approaches to guidance on bodily development and HIV prevention.

  10. HPG-axis hormones during puberty : A study on the association with hypothalamic and pituitary volumes

    NARCIS (Netherlands)

    Peper, Jiska S.; Brouwer, Rachel M.; van Leeuwen, Marieke; Schnack, Hugo G.; Boomsma, Dorret I.; Kahn, Rene S.; Pol, Hilleke E. Hulshoff

    Objective: During puberty, the hypothalamus-pituitary-gonadal (HPG) axis is activated, leading to increases in luteinizing hormone (LH), follicle stimulating hormone (FSH) and sex steroids (testosterone and estradiol) levels. We aimed to study the association between hypothalamic and pituitary

  11. Age at Onset of Puberty and Adolescent Depression: "Children of 1997" Birth Cohort.

    Science.gov (United States)

    Wang, Hui; Lin, Shi Lin; Leung, Gabriel M; Schooling, C Mary

    2016-06-01

    Timing of onset of puberty has fallen, with profound and detrimental consequences for health. We examined the associations of earlier onset of puberty with the presence of depression in early to middle adolescence. The study examined prospective adjusted associations of age at onset of puberty, based on clinically assessed Tanner stage for breast/genitalia and pubic hair development, and self-reported presence of depression, assessed from the 9-item Patient Health Questionnaire on average at 13.6 years (n = 5795 [73%]). These factors were examined by using multivariable logistic regression in a population-representative Hong Kong Chinese birth cohort (ie, the "Children of 1997"). We also assessed whether associations varied according to gender. Association of age at onset of breast/genitalia development with the presence of depression varied according to gender. Earlier onset of breast development was associated with higher risk of the presence of depression (odds ratio, 0.83 per 1 year increase in age of onset [95% confidence interval, 0.70 to 0.98]) adjusted for age, socioeconomic position, mother's place of birth, birth order, secondhand smoke exposure, parental age, survey mode, gender-specific birth weight z score, BMI z score at 7 years, and parental marital status. In boys, similarly adjusted, age at onset of genitalia development was unrelated to the presence of depression. Earlier age at onset of pubic hair development was unrelated to the presence of depression in girls and boys. Early onset of breast development was associated with high risk of the presence of depression. Whether these findings are indicators of the effects of hormones or transient effects of social pressures remain to be determined. Copyright © 2016 by the American Academy of Pediatrics.

  12. Physical growth, puberty and hormones in adolescents with Nodding Syndrome; a pilot study.

    Science.gov (United States)

    Piloya-Were, Theresa; Odongkara-Mpora, Beatrice; Namusoke, Hanifa; Idro, Richard

    2014-11-28

    Nodding syndrome is an epidemic symptomatic generalized epilepsy syndrome of unknown cause in Eastern Africa. Some patients have extreme short stature. We hypothesized that growth failure in nodding syndrome is associated with specific endocrine dysfunctions. In this pilot study, we examined the relationship between serum hormone levels and stature, bone age and sexual development. We recruited ten consecutive children, 13 years or older, with World Health Organization defined nodding syndrome and assessed physical growth, bone age, development of secondary sexual characteristics and serum hormone levels. Two children with incomplete results were excluded. Of the eight remaining, two had severe stunting (height for age Z [HAZ] scorebone age was delayed by a median 3(range 0-4) years. Serum growth hormone levels were normal in all eight but the two patients with severe stunting and one with moderate stunting had low levels of Somatomedin C (Insulin like Growth Factor [IGF1]) and/or IGF binding protein 3 (IGFBP3), mediators of growth hormone function. A linear relationship was observed between serum IGF1 level and HAZ score. With the exception of one child, all were either pre-pubertal or in early puberty (Tanner stages 1 and 2) and in the seven, levels of the gonadotrophins (luteinising and follicle stimulating hormone) and the sex hormones (testosterone/oestrogen) were all within pre-pubertal ranges or ranges of early puberty. Thyroid function, prolactin, adrenal, and parathyroid hormone levels were all normal. Patients with nodding syndrome may have dysfunctions in the pituitary growth hormone and pituitary gonadal axes that manifest as stunted growth, delayed bone age and puberty. Studies are required to determine if such endocrine dysfunction is a primary manifestation of the disease or a secondary consequence of chronic ill health and malnutrition and if so, whether targeted interventions can improve outcome.

  13. Age at puberty on Nganda cattle under traditional and improved management conditions in Uganda

    International Nuclear Information System (INIS)

    Miyingo-Kezimbira, L.

    1990-01-01

    Research into the reproductive efficiency of Nganda cattle was carried out in a study with two separate parts. The aim of the first part of the study was to determine whether delayed puberty was a serious problem in Nganda heifers. Sixty Nganda heifers and their crosses with the other local types were monitored for ovarian activity to establish their cyclicity. The results indicated that over 50% started cycling at about 2.5 years of age; nearly 90% of the heifers had started sexual activity by 3 years of age. To test whether the age at puberty could be reduced by supplementary feeding and control of internal and external parasites, 20 Nganda heifers 1.5 years old were selected in the second part of the study. The results proved that supplementary feeding, deworming and spraying against ectoparasites had a positive influence on the initiation of sexual activity in pubertal Nganda heifers. (author). 10 refs, 6 tabs

  14. Development of rat female genital cortex and control of female puberty by sexual touch.

    Directory of Open Access Journals (Sweden)

    Constanze Lenschow

    2017-09-01

    Full Text Available Rat somatosensory cortex contains a large sexually monomorphic genital representation. Genital cortex undergoes an unusual 2-fold expansion during puberty. Here, we investigate genital cortex development and female rat sexual maturation. Ovariectomies and estradiol injections suggested sex hormones cause the pubertal genital cortex expansion but not its maintenance at adult size. Genital cortex expanded by thalamic afferents invading surrounding dysgranular cortex. Genital touch was a dominant factor driving female sexual maturation. Raising female rats in contact with adult males promoted genital cortex expansion, whereas contact to adult females or nontactile (audio-visual-olfactory male cues did not. Genital touch imposed by human experimenters powerfully advanced female genital cortex development and sexual maturation. Long-term blocking of genital cortex by tetrodotoxin in pubescent females housed with males prevented genital cortex expansion and decelerated vaginal opening. Sex hormones, sexual experience, and neural activity shape genital cortex, which contributes to the puberty promoting effects of sexual touch.

  15. Development of rat female genital cortex and control of female puberty by sexual touch.

    Science.gov (United States)

    Lenschow, Constanze; Sigl-Glöckner, Johanna; Brecht, Michael

    2017-09-01

    Rat somatosensory cortex contains a large sexually monomorphic genital representation. Genital cortex undergoes an unusual 2-fold expansion during puberty. Here, we investigate genital cortex development and female rat sexual maturation. Ovariectomies and estradiol injections suggested sex hormones cause the pubertal genital cortex expansion but not its maintenance at adult size. Genital cortex expanded by thalamic afferents invading surrounding dysgranular cortex. Genital touch was a dominant factor driving female sexual maturation. Raising female rats in contact with adult males promoted genital cortex expansion, whereas contact to adult females or nontactile (audio-visual-olfactory) male cues did not. Genital touch imposed by human experimenters powerfully advanced female genital cortex development and sexual maturation. Long-term blocking of genital cortex by tetrodotoxin in pubescent females housed with males prevented genital cortex expansion and decelerated vaginal opening. Sex hormones, sexual experience, and neural activity shape genital cortex, which contributes to the puberty promoting effects of sexual touch.

  16. Female Offspring From Chronic Hyperandrogenemic Dams Exhibit Delayed Puberty and Impaired Ovarian Reserve.

    Science.gov (United States)

    Wang, Zhiqiang; Shen, Mingjie; Xue, Ping; DiVall, Sara A; Segars, James; Wu, Sheng

    2018-02-01

    Female offspring of many species exposed to high doses of androgens in utero experience endocrine dysfunction during adulthood. The phenotype of offspring from females with prepregnancy hyperandrogenemia and impaired ovulation, however, has not been examined. We developed a mouse model of hyperandrogenemia by implanting a low-dose dihydrotestosterone (DHT) pellet 15 days before conception. Female offspring born to dams with hyperandrogenemia (DHT daughters) had delayed puberty (P DHT (non-DHT daughters, PND37.5). Serum follicle-stimulating hormone (FSH) levels in the DHT daughters were fourfold higher (P DHT daughters (controls). DHT daughters showed an extended time in metestrus/diestrus and a shorter time in the proestrus/estrus phase compared with non-DHT daughters (P DHT daughters compared with non-DHT daughters (P DHT daughters compared with non-DHT daughters. Daughters from hyperandrogenemic females exhibited elevated prepubertal FSH levels, diminished ovarian response to superovulation, impaired estrous cyclicity, delayed onset of puberty, and reduced ovarian reserve, suggesting that fetal androgen exposure had lasting effects on female reproductive function. Copyright © 2018 Endocrine Society.

  17. Contributions of Function-Altering Variants in Genes Implicated in Pubertal Timing and Body Mass for Self-Limited Delayed Puberty.

    Science.gov (United States)

    Howard, Sasha R; Guasti, Leonardo; Poliandri, Ariel; David, Alessia; Cabrera, Claudia P; Barnes, Michael R; Wehkalampi, Karoliina; O'Rahilly, Stephen; Aiken, Catherine E; Coll, Anthony P; Ma, Marcella; Rimmington, Debra; Yeo, Giles S H; Dunkel, Leo

    2018-02-01

    Self-limited delayed puberty (DP) is often associated with a delay in physical maturation, but although highly heritable the causal genetic factors remain elusive. Genome-wide association studies of the timing of puberty have identified multiple loci for age at menarche in females and voice break in males, particularly in pathways controlling energy balance. We sought to assess the contribution of rare variants in such genes to the phenotype of familial DP. We performed whole-exome sequencing in 67 pedigrees (125 individuals with DP and 35 unaffected controls) from our unique cohort of familial self-limited DP. Using a whole-exome sequencing filtering pipeline one candidate gene [fat mass and obesity-associated gene (FTO)] was identified. In silico, in vitro, and mouse model studies were performed to investigate the pathogenicity of FTO variants and timing of puberty in FTO+/- mice. We identified potentially pathogenic, rare variants in genes in linkage disequilibrium with genome-wide association studies of age at menarche loci in 283 genes. Of these, five genes were implicated in the control of body mass. After filtering for segregation with trait, one candidate, FTO, was retained. Two FTO variants, found in 14 affected individuals from three families, were also associated with leanness in these patients with DP. One variant (p.Leu44Val) demonstrated altered demethylation activity of the mutant protein in vitro. Fto+/- mice displayed a significantly delayed timing of pubertal onset (P puberty in the general population may contribute to the pathogenesis of self-limited DP. Copyright © 2017 Endocrine Society

  18. Alcohol alters hypothalamic glial-neuronal communications involved in the neuroendocrine control of puberty: In vivo and in vitro assessments.

    Science.gov (United States)

    Dees, W L; Hiney, J K; Srivastava, V K

    2015-11-01

    The onset of puberty is the result of the increased secretion of hypothalamic luteinizing hormone-releasing hormone (LHRH). The pubertal process can be altered by substances that can affect the prepubertal secretion of this peptide. Alcohol is one such substance known to diminish LHRH secretion and delay the initiation of puberty. The increased secretion of LHRH that normally occurs at the time of puberty is due to a decrease of inhibitory tone that prevails prior to the onset of puberty, as well as an enhanced development of excitatory inputs to the LHRH secretory system. Additionally, it has become increasingly clear that glial-neuronal communications are important for pubertal development because they play an integral role in facilitating the pubertal rise in LHRH secretion. Thus, in recent years attempts have been made to identify specific glial-derived components that contribute to the development of coordinated communication networks between glia and LHRH cell bodies, as well as their nerve terminals. Transforming growth factor-α and transforming growth factor-β1 are two such glial substances that have received attention in this regard. This review summarizes the use of multiple neuroendocrine research techniques employed to assess these glial-neuronal communication pathways involved in regulating prepubertal LHRH secretion and the effects that alcohol can have on their respective functions. Copyright © 2015 Elsevier Inc. All rights reserved.

  19. Self-reported onset of puberty and subsequent semen quality and reproductive hormones in healthy young men

    DEFF Research Database (Denmark)

    Jensen, Tina Kold; Finne, Katrine Folmann; Skakkebæk, Niels E

    2016-01-01

    , at the same time as or later than their peers. Their semen quality (semen volume, sperm concentration, total sperm count and percentages of motile and morphologically normal spermatozoa) and serum concentrations of sex hormones (LH, FSH, total testosterone, SHBG, inhibin B) and testicular size were determined......Study Question Is there an association between pubertal onset and subsequent reproductive health in young men? Summary Answer Self-reported later onset of puberty was associated with reduced semen quality and altered serum levels of reproductive hormones among 1068 healthy, young Danish men. What...... is Known Already The long-term effects of variations in the onset of male puberty on subsequent reproduction remain largely unstudied. Study Design, Size, Duration In a cross-sectional study, young healthy Danish men were approached when they attended a compulsory medical examination to determine...

  20. Other-Sex Relationship Stress and Sex Differences in the Contribution of Puberty to Depression

    Science.gov (United States)

    Llewellyn, Nicole; Rudolph, Karen D.; Roisman, Glenn I.

    2012-01-01

    Research suggests that the pubertal transition, particularly when experienced earlier than age-matched peers, is associated with heightened depression in girls but less depression in boys. This study examined whether stress within other-sex relationships serves as one process through which puberty differentially contributes to depression for girls…

  1. Genomic analyses identify hundreds of variants associated with age at menarche and support a role for puberty timing in cancer risk.

    Science.gov (United States)

    Day, Felix R; Thompson, Deborah J; Helgason, Hannes; Chasman, Daniel I; Finucane, Hilary; Sulem, Patrick; Ruth, Katherine S; Whalen, Sean; Sarkar, Abhishek K; Albrecht, Eva; Altmaier, Elisabeth; Amini, Marzyeh; Barbieri, Caterina M; Boutin, Thibaud; Campbell, Archie; Demerath, Ellen; Giri, Ayush; He, Chunyan; Hottenga, Jouke J; Karlsson, Robert; Kolcic, Ivana; Loh, Po-Ru; Lunetta, Kathryn L; Mangino, Massimo; Marco, Brumat; McMahon, George; Medland, Sarah E; Nolte, Ilja M; Noordam, Raymond; Nutile, Teresa; Paternoster, Lavinia; Perjakova, Natalia; Porcu, Eleonora; Rose, Lynda M; Schraut, Katharina E; Segrè, Ayellet V; Smith, Albert V; Stolk, Lisette; Teumer, Alexander; Andrulis, Irene L; Bandinelli, Stefania; Beckmann, Matthias W; Benitez, Javier; Bergmann, Sven; Bochud, Murielle; Boerwinkle, Eric; Bojesen, Stig E; Bolla, Manjeet K; Brand, Judith S; Brauch, Hiltrud; Brenner, Hermann; Broer, Linda; Brüning, Thomas; Buring, Julie E; Campbell, Harry; Catamo, Eulalia; Chanock, Stephen; Chenevix-Trench, Georgia; Corre, Tanguy; Couch, Fergus J; Cousminer, Diana L; Cox, Angela; Crisponi, Laura; Czene, Kamila; Davey Smith, George; de Geus, Eco J C N; de Mutsert, Renée; De Vivo, Immaculata; Dennis, Joe; Devilee, Peter; Dos-Santos-Silva, Isabel; Dunning, Alison M; Eriksson, Johan G; Fasching, Peter A; Fernández-Rhodes, Lindsay; Ferrucci, Luigi; Flesch-Janys, Dieter; Franke, Lude; Gabrielson, Marike; Gandin, Ilaria; Giles, Graham G; Grallert, Harald; Gudbjartsson, Daniel F; Guénel, Pascal; Hall, Per; Hallberg, Emily; Hamann, Ute; Harris, Tamara B; Hartman, Catharina A; Heiss, Gerardo; Hooning, Maartje J; Hopper, John L; Hu, Frank; Hunter, David J; Ikram, M Arfan; Im, Hae Kyung; Järvelin, Marjo-Riitta; Joshi, Peter K; Karasik, David; Kellis, Manolis; Kutalik, Zoltan; LaChance, Genevieve; Lambrechts, Diether; Langenberg, Claudia; Launer, Lenore J; Laven, Joop S E; Lenarduzzi, Stefania; Li, Jingmei; Lind, Penelope A; Lindstrom, Sara; Liu, YongMei; Luan, Jian'an; Mägi, Reedik; Mannermaa, Arto; Mbarek, Hamdi; McCarthy, Mark I; Meisinger, Christa; Meitinger, Thomas; Menni, Cristina; Metspalu, Andres; Michailidou, Kyriaki; Milani, Lili; Milne, Roger L; Montgomery, Grant W; Mulligan, Anna M; Nalls, Mike A; Navarro, Pau; Nevanlinna, Heli; Nyholt, Dale R; Oldehinkel, Albertine J; O'Mara, Tracy A; Padmanabhan, Sandosh; Palotie, Aarno; Pedersen, Nancy; Peters, Annette; Peto, Julian; Pharoah, Paul D P; Pouta, Anneli; Radice, Paolo; Rahman, Iffat; Ring, Susan M; Robino, Antonietta; Rosendaal, Frits R; Rudan, Igor; Rueedi, Rico; Ruggiero, Daniela; Sala, Cinzia F; Schmidt, Marjanka K; Scott, Robert A; Shah, Mitul; Sorice, Rossella; Southey, Melissa C; Sovio, Ulla; Stampfer, Meir; Steri, Maristella; Strauch, Konstantin; Tanaka, Toshiko; Tikkanen, Emmi; Timpson, Nicholas J; Traglia, Michela; Truong, Thérèse; Tyrer, Jonathan P; Uitterlinden, André G; Edwards, Digna R Velez; Vitart, Veronique; Völker, Uwe; Vollenweider, Peter; Wang, Qin; Widen, Elisabeth; van Dijk, Ko Willems; Willemsen, Gonneke; Winqvist, Robert; Wolffenbuttel, Bruce H R; Zhao, Jing Hua; Zoledziewska, Magdalena; Zygmunt, Marek; Alizadeh, Behrooz Z; Boomsma, Dorret I; Ciullo, Marina; Cucca, Francesco; Esko, Tõnu; Franceschini, Nora; Gieger, Christian; Gudnason, Vilmundur; Hayward, Caroline; Kraft, Peter; Lawlor, Debbie A; Magnusson, Patrik K E; Martin, Nicholas G; Mook-Kanamori, Dennis O; Nohr, Ellen A; Polasek, Ozren; Porteous, David; Price, Alkes L; Ridker, Paul M; Snieder, Harold; Spector, Tim D; Stöckl, Doris; Toniolo, Daniela; Ulivi, Sheila; Visser, Jenny A; Völzke, Henry; Wareham, Nicholas J; Wilson, James F; Spurdle, Amanda B; Thorsteindottir, Unnur; Pollard, Katherine S; Easton, Douglas F; Tung, Joyce Y; Chang-Claude, Jenny; Hinds, David; Murray, Anna; Murabito, Joanne M; Stefansson, Kari; Ong, Ken K; Perry, John R B

    2017-06-01

    The timing of puberty is a highly polygenic childhood trait that is epidemiologically associated with various adult diseases. Using 1000 Genomes Project-imputed genotype data in up to ∼370,000 women, we identify 389 independent signals (P < 5 × 10 -8 ) for age at menarche, a milestone in female pubertal development. In Icelandic data, these signals explain ∼7.4% of the population variance in age at menarche, corresponding to ∼25% of the estimated heritability. We implicate ∼250 genes via coding variation or associated expression, demonstrating significant enrichment in neural tissues. Rare variants near the imprinted genes MKRN3 and DLK1 were identified, exhibiting large effects when paternally inherited. Mendelian randomization analyses suggest causal inverse associations, independent of body mass index (BMI), between puberty timing and risks for breast and endometrial cancers in women and prostate cancer in men. In aggregate, our findings highlight the complexity of the genetic regulation of puberty timing and support causal links with cancer susceptibility.

  2. Growth, development, puberty and adult height before and during treatment in children with congenital isolated growth hormone deficiency.

    Science.gov (United States)

    Smuel, Keren; Kauli, Rivka; Lilos, Pearl; Laron, Zvi

    2015-08-01

    To describe the growth, development and puberty in children with congenital IGHD before and during hGH treatment. Patients with cIGHD treated by hGH between the years 1958-1992. All patients were diagnosed, treated and followed in our clinic. Data were found in 37/41 patients (21 m, 16 f). 34 had hGH-1A deletions, 7 GHRH-R mutations. Patients, referred after age 25, were excluded. The birth length of 10/37 neonates was 48.29±2.26 (44-50) cm. Birth weight of 28/37 neonates was 3380±370 g (m), 3230±409 g (f). Neuromotor milestones were variable. Age at referral was 5.7±4.2 y (m) and 5.6±3.8 y (f). Initiation of hGH treatment (35μg/kg/d) was 7.5±4.8, (0.8-15.08) y (m) and 6.8±4.36 (0.8-16.5) y (f). Height SDS increased from -4.3 to -1.8 (m) and from -4.5 to -2.6 (f). Head circumference increased from -2.6 to -1.3 (m) and from -2.7 to -2.3 (f). BMI increased from 15.8 to 20.6 (m) and from 15.5 to 20.4 (f). There was a negative correlation between age of hGH initiation and change in height SDS (r=-0.66; ρPuberty was delayed in boys, less so in girls. Mean age of 1st ejaculation (14 m) was 17.6±2.2 y and of menarche (14 f. was 13.7±1.2 y. In both genders there was a positive correlation between age at start of hGH and age at onset of puberty (r=0.57; ρpuberty. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. The effects of educating mothers and girls on the girls' attitudes toward puberty health: a randomized controlled trial.

    Science.gov (United States)

    Afsari, Atousa; Mirghafourvand, Mojgan; Valizadeh, Sousan; Abbasnezhadeh, Massomeh; Galshi, Mina; Fatahi, Samira

    2017-04-01

    The attitude of a girl toward her menstruation and puberty has a considerable impact on her role during motherhood, social adjustment, and future marital life. This study was conducted in 2014 with the aim of comparing the effects of educating mothers and girls on the attitudes of adolescent girls of Tabriz City, Iran, towards puberty health. This randomized control clinical trial was conducted on 364 adolescent girls who experienced menstruation. Twelve schools were selected randomly among 107 secondary schools for girls. One-third of the students of each school were selected randomly using a table of random numbers and socio-demographic and each participant was asked to answer the attitude questionnaires. The schools were randomly allocated to the groups of mother's education, girl's education, and no-intervention. The attitude questionnaire was filled out by the participants again 2 months after intervention. The general linear model, in which the baseline values were controlled, was employed to compare the scores of the three groups after the intervention. No significant differences were observed among the three groups in terms of the attitude score before intervention (p>0.05). Attitude score improvement after intervention in the girl's education group was significantly higher than the one of both mother's education (adjusted mean difference [AMD]: 1.8; [95% confidence interval (CI): 0.4-1.3]) and no-intervention groups (AMD: 1.3; [95% CI: 0.0-2.6]) by controlling the attitude score before intervention. Based on the findings, it is more effective to educate girls directly about puberty health to improve adolescent girls' attitudes than educating mothers and asking them to transfer information to the girls. Nevertheless, studies with longer training period and follow-up are proposed to determine the effects of educating girls (through their mothers) on their attitudes about puberty health.

  4. Association of Obesity with Onset of Puberty and Sex Hormones in Chinese Girls: A 4-Year Longitudinal Study.

    Directory of Open Access Journals (Sweden)

    Lingling Zhai

    Full Text Available To examine the influence of childhood obesity on the early onset of puberty and sex hormones in girls.Healthy girls with different percentages of body fat at baseline (40 obese, 40 normal, and 40 lean were recruited from three elementary schools in Shenyang, China. These girls (mean age 8.5 years were also matched by height, school grade, Tanner stage, and family economic status at baseline. Anthropometry, puberty characteristics, and sex hormone concentrations were measured at baseline and at each follow-up visit. The generalized estimating equation model and analysis of variance for repeated measures using a generalized linear model were used to determine the differences in puberty characteristics and sex hormones among three groups.Over 4 years, mean age of breast II onset was earlier among obese girls (8.8 years than normal girls (9.2 years and lean girls (9.3 years. The prevalence (% of early-maturation in the obese, normal, and lean groups was 25.9%, 11.1%, and 7.4%, respectively. Obesity was associated with an increased risk for breast stage II (year 2: RR, 6.3; 95% CI, 1.9-21.1 and year 3: RR, 6.9; 95% CI, 0.8-60.1. None of the girls experienced menarche in the first year; however, by the fourth year 50.0% of obese girls had menarche onset, which was higher than normal weight (27.5% and lean girls (8.1%. The mean estradiol level increased with age in the obese, normal, and lean groups. The mean estradiol concentration was higher in obese girls than in normal and lean girls throughout the 4-year period (P<0.05.Childhood obesity contributes to early onset of puberty and elevated levels of estradiol in girls.

  5. Decrease in plasma high-density lipoprotein cholesterol levels at puberty in boys with delayed adolescence: correlation with plasma testosterone levels

    International Nuclear Information System (INIS)

    Kirkland, R.T.; Keenan, B.S.; Probstfield, J.L.; Patsch, W.; Lin, T.L.; Clayton, G.W.; Insull, W. Jr.

    1987-01-01

    A three-phase study tested the hypothesis that the decrease in the high-density lipoprotein cholesterol (HDL-C) level observed in boys at puberty is related to an increase in the plasma testosterone concentration. In phase I, 57 boys aged 10 to 17 years were categorized into four pubertal stages based on clinical parameters and plasma testosterone levels. These four groups showed increasing plasma testosterone values and decreasing HDL-C levels. In phase II, 14 boys with delayed adolescence were treated with testosterone enanthate. Plasma testosterone levels during therapy were in the adult male range. Levels of HDL-C decreased by a mean of 7.4 mg/dL (0.20 mmol/L) and 13.7 mg/dL (0.35 mmol/L), respectively, after the first two doses. In phase III, 13 boys with delayed adolescence demonstrated increasing plasma testosterone levels and decreasing HDL-C levels during spontaneous puberty. Levels of HDL-C and apolipoprotein A-1 were correlated during induced and spontaneous puberty. Testosterone should be considered a significant determinant of plasma HDL-C levels during pubertal development

  6. Relationship between pre-weaning gain, age at puberty, and reproductive tract development in Angus heifers

    Science.gov (United States)

    Beef heifers should initiate reproductive cycles by 12 mo of age to insure multiple estrous cycles before the start of the breeding season to maximize fertility. Previous research indicated that pre-weaning gain positively influenced the onset of puberty and antral follicle numbers. Therefore, the...

  7. Genome-wide association and identification of candidate genes for age at puberty in swine

    Science.gov (United States)

    Reproductive efficiency has a great impact on the economic success of pork production. Gilts comprise a significant portion of breeding females and gilts that reach puberty earlier tend to stay in the herd longer and be more productive. About 10 to 30% of gilts never farrow a litter and the most com...

  8. Evidence that obesity and androgens have independent and opposing effects on gonadotropin production from puberty to maturity

    Science.gov (United States)

    Rosenfield, Robert L; Bordini, Brian

    2010-01-01

    Optimal fat mass is necessary for normal gonadotropin levels in adults, and both undernutrition and overnutrition suppress gonadotropins: thus, the gonadotropin response to relative adipose mass is biphasic. Adult obesity is associated with blunted luteinizing hormone (LH) pulse amplitude that is partially attributable to increased LH clearance rate. Testosterone appears to have a biphasic effect on gonadotropin production in females. Moderate elevations of testosterone appear to stimulate LH production at both the hypothalamic and pituitary level, while very high levels of testosterone suppress LH. Thus, obesity per se appears to suppress gonadotropin production, and moderate hyperandrogenemia in women appears to stimulate LH. The ordinary hypergonadotropic hyperandrogenism of obese women appears to be an exception to this model because it is usually due to polycystic ovary syndrome (PCOS), a condition in which intrinsic functional ovarian hyperandrogenism and excess adiposity share a common origin that involves insulin-resistant hyperinsulinemia. LH elevation seems to be secondary to hyperandrogenemia and is absent in the most obese cases. Overweight early pubertal girls have significant blunting of sleep-related LH production, which is the first hormonal change of puberty. The data are compatible with the possibility that excess adiposity may paradoxically subtly suppress hypothalamic-pituitary-gonadal function in early puberty although it is known to contribute to the early onset of puberty. PMID:20816944

  9. Increasing abscisic acid levels by immunomodulation in barley grains induces precocious maturation without changing grain composition.

    Science.gov (United States)

    Staroske, Nicole; Conrad, Udo; Kumlehn, Jochen; Hensel, Götz; Radchuk, Ruslana; Erban, Alexander; Kopka, Joachim; Weschke, Winfriede; Weber, Hans

    2016-04-01

    Abscisic acid (ABA) accumulates in seeds during the transition to the seed filling phase. ABA triggers seed maturation, storage activity, and stress signalling and tolerance. Immunomodulation was used to alter the ABA status in barley grains, with the resulting transgenic caryopses responding to the anti-ABA antibody gene expression with increased accumulation of ABA. Calculation of free versus antibody-bound ABA reveals large excess of free ABA, increasing signficantly in caryopses from 10 days after fertilization. Metabolite and transcript profiling in anti-ABA grains expose triggered and enhanced ABA-functions such as transcriptional up-regulation of sucrose-to-starch metabolism, storage protein synthesis and ABA-related signal transduction. Thus, enhanced ABA during transition phases induces precocious maturation but negatively interferes with growth and development. Anti-ABA grains display broad constitutive gene induction related to biotic and abiotic stresses. Most of these genes are ABA- and/or stress-inducible, including alcohol and aldehyde dehydrogenases, peroxidases, chaperones, glutathione-S-transferase, drought- and salt-inducible proteins. Conclusively, ABA immunomodulation results in precocious ABA accumulation that generates an integrated response of stress and maturation. Repression of ABA signalling, occurring in anti-ABA grains, potentially antagonizes effects caused by overshooting production. Finally, mature grain weight and composition are unchanged in anti-ABA plants, although germination is somewhat delayed. This indicates that anti-ABA caryopses induce specific mechanisms to desensitize ABA signalling efficiently, which finally yields mature grains with nearly unchanged dry weight and composition. Such compensation implicates the enormous physiological and metabolic flexibilities of barley grains to adjust effects of unnaturally high ABA amounts in order to ensure and maintain proper grain development. © The Author 2016. Published by

  10. Diurnal and seasonal cortisol, testosterone, and DHEA rhythms in boys and girls during puberty.

    Science.gov (United States)

    Matchock, Robert L; Dorn, Lorah D; Susman, Elizabeth J

    2007-01-01

    Diurnal and seasonal rhythms of cortisol, testosterone, and DHEA were examined, as little is known about the relationship between these rhythmicities and pubertal development. Salivary samples were obtained from 60 boys and 60 girls at approximately 07:45, 08:00, 08:30, 12:00, 16:50, and 21:00 h. The participants' ages ranged from 8-14 yrs, and each participant was tested three times at six-month intervals. The study was conducted at a General Clinical Research Center (GCRC) and at the homes of the participants. All hormones showed diurnal fluctuations. The acrophase (peak time) of cortisol occurred earlier than for testosterone or DHEA and showed a seasonal effect, with the acrophase occurring earlier in spring than in summer. The cortisol acrophase also occurred later in the day for boys than for girls during later puberty. Seasonal effects were found only for cortisol with higher concentrations in the spring and summer. Cortisol concentrations were relatively stable across pubertal maturation, but significantly lower concentrations were observed at pubertal stage 3 compared to the other stages. Morning cortisol levels were also higher in boys at pubertal stage 2. Testosterone concentrations were higher in boys at pubertal stages 3 and 4, and DHEA was lower at pubertal stage 1 than 3 and 4 for both boys and girls. For the total sample, there was a positive correlation between DHEA and testosterone during early puberty (stages 1-3) but not later puberty (stages 4-5). Awakening secretory activity correlated with daytime secretory activity for testosterone and DHEA, but not for cortisol. These data provide novel chronobiological information on cortisol, testosterone, and DHEA as it relates to sexual maturation and encourage further study on both normal and abnormal endocrine rhythms.

  11. Endogenous Cushing’s Syndrome with Precocious Puberty in an 8-Year-Old Boy due to a Large Unilateral Adrenal Adenoma

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    Muhammad Rajib Hossain

    2013-01-01

    Full Text Available Adrenocortical tumors (ACTs causing Cushing’s syndrome are extremely rare in children and adolescents. Bilateral macronodular adrenocortical disease which is a component of the McCune-Albright syndrome is the most common cause of endogenous Cushing’s syndrome. We report the case of a boy with Cushing’s syndrome who presented with obesity and growth retardation. The child was hypertensive. The biochemical evaluation revealed that his serum cortisol levels were 25.80 g/dL, with a concomitant plasma ACTH level of 10.0 pg/mL and nonsuppressed serum cortisol on high-dose dexamethasone suppression test (HDDST to be 20.38 g/dL. Computed tomography of the abdomen demonstrated a 8 × 6 × 5 cm left adrenal mass with internal calcifications. Following preoperative stabilization, laparotomy was carried out which revealed a lobulated left adrenal mass with intact capsule weighing 120 grams. Histopathological examination revealed a benign cortical neoplastic lesion, suggestive of adrenal adenoma; composed of large polygonal cells with centrally placed nuclei and prominent nucleoli without capsular and vascular invasion. On the seventh postoperative day, cortisol levels were within normal range indicating biochemical remission of Cushing’s syndrome. On followup after three months, the patient showed significant clinical improvement and had lost moderate amount of weight and adrenal imaging was found to be normal.

  12. MRI of the hypothalamic-pituitary axis in children

    International Nuclear Information System (INIS)

    Argyropoulou, Maria I.; Kiortsis, Dimitrios Nikiforos

    2005-01-01

    In childhood, the MR characteristics of the normal pituitary gland are well established. During the first 2 months of life the adenohypophysis demonstrates high signal. Pituitary gland height (PGH) decreases during the 1st year of life and then increases, reaching a plateau after puberty. The magnetization transfer ratio (MTR) increases in both sexes up to the age of 20 years. On dynamic contrast-enhanced studies, the posterior pituitary lobe enhances simultaneously with the straight sinus, and the adenohypophysis later, but within 30 s. In genetically determined dysfunctional states, the adenohypophysis may be normal, hypoplastic, or enlarged. Pituitary enlargement, observed in Prop 1 gene mutations, is characterized by a mass interposed between the anterior and posterior lobes. An ectopic posterior lobe (EPP), associated with a hypoplastic or absent pituitary stalk, may be observed in patients with hypopituitarism. Tumors of the hypothalamic-pituitary (HP) axis may be the origin of adenohypophyseal deficiencies. A small hypointense adenohypophysis is found in iron overload states and is often associated with hypogonadotrophic hypogonadism. Absence of the posterior lobe bright signal, with or without a thick pituitary stalk or a mass at any site from the median eminence to the posterior pituitary lobe, may be found in diabetes insipidus. Hydrocephalus, suprasellar arachnoid cysts, hypothalamic hamartomas and craniopharyngiomas may result in central precocious puberty (CPP). Increased PGH in girls with idiopathic CPP is useful for its differential diagnosis from premature thelarche (PT). Pituitary adenomas, observed mainly in adolescents, present the same MR characteristics as those in adults. (orig.)

  13. MRI of the hypothalamic-pituitary axis in children

    Energy Technology Data Exchange (ETDEWEB)

    Argyropoulou, Maria I. [University of Ioannina, Department of Radiology, Medical School, Ioannina (Greece); Kiortsis, Dimitrios Nikiforos [University of Ioannina, Department of Physiology, Medical School, Ioannina (Greece)

    2005-11-01

    In childhood, the MR characteristics of the normal pituitary gland are well established. During the first 2 months of life the adenohypophysis demonstrates high signal. Pituitary gland height (PGH) decreases during the 1st year of life and then increases, reaching a plateau after puberty. The magnetization transfer ratio (MTR) increases in both sexes up to the age of 20 years. On dynamic contrast-enhanced studies, the posterior pituitary lobe enhances simultaneously with the straight sinus, and the adenohypophysis later, but within 30 s. In genetically determined dysfunctional states, the adenohypophysis may be normal, hypoplastic, or enlarged. Pituitary enlargement, observed in Prop 1 gene mutations, is characterized by a mass interposed between the anterior and posterior lobes. An ectopic posterior lobe (EPP), associated with a hypoplastic or absent pituitary stalk, may be observed in patients with hypopituitarism. Tumors of the hypothalamic-pituitary (HP) axis may be the origin of adenohypophyseal deficiencies. A small hypointense adenohypophysis is found in iron overload states and is often associated with hypogonadotrophic hypogonadism. Absence of the posterior lobe bright signal, with or without a thick pituitary stalk or a mass at any site from the median eminence to the posterior pituitary lobe, may be found in diabetes insipidus. Hydrocephalus, suprasellar arachnoid cysts, hypothalamic hamartomas and craniopharyngiomas may result in central precocious puberty (CPP). Increased PGH in girls with idiopathic CPP is useful for its differential diagnosis from premature thelarche (PT). Pituitary adenomas, observed mainly in adolescents, present the same MR characteristics as those in adults. (orig.)

  14. Cup Blocks the Precocious Activation of the Orb Autoregulatory Loop

    Science.gov (United States)

    Wong, Li Chin; Schedl, Paul

    2011-01-01

    Translational regulation of localized mRNAs is essential for patterning and axes determination in many organisms. In the Drosophila ovary, the germline-specific Orb protein mediates the translational activation of a variety of mRNAs localized in the oocyte. One of the Orb target mRNAs is orb itself, and this autoregulatory activity ensures that Orb proteins specifically accumulate in the developing oocyte. Orb is an RNA-binding protein and is a member of the cytoplasmic polyadenylation element binding (CPEB) protein family. We report here that Cup forms a complex in vivo with Orb. We also show that cup negatively regulates orb and is required to block the precocious activation of the orb positive autoregulatory loop. In cup mutant ovaries, high levels of Orb accumulate in the nurse cells, leading to what appears to be a failure in oocyte specification as a number of oocyte markers inappropriately accumulate in nurse cells. In addition, while orb mRNA is mislocalized and destabilized, a longer poly(A) tail is maintained than in wild type ovaries. Analysis of Orb phosphoisoforms reveals that loss of cup leads to the accumulation of hyperphosphorylated Orb, suggesting that an important function of cup in orb-dependent mRNA localization pathways is to impede Orb activation. PMID:22164257

  15. Social isolation during puberty affects female sexual behavior in mice

    Directory of Open Access Journals (Sweden)

    Jasmina eKercmar

    2014-09-01

    Full Text Available Exposure to stress during puberty can lead to long-term behavioral alterations in adult rodents coincident with sex steroid hormone-dependent brain remodeling and reorganization. Social isolation is a stress for social animals like mice, but little is known about the effects of such stress during adolescence on later reproductive behaviors. The present study examined sexual behavior of ovariectomized, estradiol and progesterone primed female mice that were individually housed from 25 days of age until testing at approximately 95 days, or individually housed from day 25 until day 60 (during puberty, followed by housing in social groups. Mice in these isolated groups were compared to females that were group housed throughout the experiment. Receptive sexual behaviors of females and behaviors of stimulus males were recorded. Females housed in social groups displayed greater levels of receptive behaviors in comparison to both socially isolated groups. Namely, social females had higher lordosis quotients and more often displayed stronger lordosis postures in comparison to isolated females. No differences between female groups were observed in stimulus male sexual behavior suggesting that female ’attractiveness’ was not affected by their social isolation. Females housed in social groups had fewer cells containing immunoreactive estrogen receptor (ER α in the anteroventral periventricular nucleus (AVPV and in the ventromedial nucleus of the hypothalamus (VMH than both isolated groups. These results suggest that isolation during adolescence affects female sexual behavior and re-socialization for one month in adulthood is insufficient to rescue lordosis behavior from the effects of social isolation during the pubertal period.

  16. Binge-pattern alcohol exposure during puberty induces long-term changes in HPA axis reactivity.

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    Magdalena M Przybycien-Szymanska

    2011-04-01

    Full Text Available Adolescence is a dynamic and important period of brain development however, little is known about the long-term neurobiological consequences of alcohol consumption during puberty. Our previous studies showed that binge-pattern ethanol (EtOH treatment during pubertal development negatively dysregulated the responsiveness of the hypothalamo-pituitary-adrenal (HPA axis, as manifested by alterations in corticotrophin-releasing hormone (CRH, arginine vasopressin (AVP, and corticosterone (CORT during this time period. Thus, the primary goal of this study was to determine whether these observed changes in important central regulators of the stress response were permanent or transient. In this study, juvenile male Wistar rats were treated with a binge-pattern EtOH treatment paradigm or saline alone for 8 days. The animals were left undisturbed until adulthood when they received a second round of treatments consisting of saline alone, a single dose of EtOH, or a second binge-pattern treatment paradigm. The results showed that pubertal binge-pattern EtOH exposure induced striking long-lasting alterations of many HPA axis parameters. Overall, our data provide strong evidence that binge-pattern EtOH exposure during pubertal maturation has long-term detrimental effects for the healthy development of the HPA axis.

  17. Puberty in perinatal HIV-1 infection: a multicentre longitudinal study of 212 children.

    Science.gov (United States)

    de Martino, M; Tovo, P A; Galli, L; Gabiano, C; Chiarelli, F; Zappa, M; Gattinara, G C; Bassetti, D; Giacomet, V; Chiappini, E; Duse, M; Garetto, S; Caselli, D

    2001-08-17

    To define age at entry into Tanner stages in children with perinatal HIV-1 infection. Multicentre longitudinal study including 212 perinatally HIV-1-infected children (107 girls and 105 boys) followed-up during puberty (from 8 and 9 years onwards in girls and boys, respectively). Healthy children (843 girls and 821 boys) provided reference percentiles. P2 or B2 stages in girls and P2 or G2 stages in boys defined onset of puberty. The cumulative probability [95% confidence limit (CI)] of entry into each stage at different ages was estimated by the Kaplan-Meier product-limit method; differences were evaluated by log rank test. Relationships were tested using the Spearman's rank correlation coefficient. Ages of girls [years (95%CI)] at P2 [12.9 (12.6-13.2)], P3 [13.4 (13.0-13.8)], P4 [14.6 (14.0-15.2)], B2 [12.7 (12.2-13.2)], B3 [13.3 (12.8-14.0)] and B4 [14.6 (14.0-15.2)] stages were > 97th percentile (> or = 21 month delay) of controls. Ages of boys [years (95%CI)] at P2 [12.6 (12.1-13.1)], P3 [13.9 (13.4-14.4)], P4 [14.9 (14.2-15.6)], G2 [12.1 (11.5-12.7)], G3 [13.6 (13.1-14.1)] and G4 [14.9 (14.1-15.7)] stages were at the 75-97th percentiles (< or = 15 month delay). Age at onset of puberty was not related to clinical and immunological condition, antiretroviral treatment, weigh for height and age at onset of severe disease or immune suppression. Perinatal HIV-1 infection interferes with sexual maturation. The mechanisms by which this occurs should be elucidated and intervention strategies designed. Intervention could save much psychological distress, since associated linear growth failure can exacerbate adolescents' feelings of being different and unwell.

  18. Feeding prepubescent gilts a high-fat diet induces molecular changes in the hypothalamus-pituitary-gonadal axis and predicts early timing of puberty.

    Science.gov (United States)

    Zhuo, Yong; Zhou, Dongsheng; Che, Lianqiang; Fang, Zhengfeng; Lin, Yan; Wu, De

    2014-01-01

    The onset of puberty in females has been occurring earlier over the past decades, presumably as a result of improved nutrition in developed countries. However, the underlying molecular mechanisms responsible for the early attainment of puberty as a result of nutrition fortification remain largely unknown. The aim of this study was to evaluate the hormone and gene expression changes in prepubescent gilts fed a high-fat diet to investigate whether these changes could predict the early timing of puberty. Forty gilts were fed a daily basal diet (LE) or a basal diet with an additional 270 g/d or 340 g/d of fat (HE) during the prepubescent phase. Blood samples were collected during the prepubescent phase to detect hormone secretion changes in insulin-like growth factor-1, kisspeptin, estradiol, progesterone, and leptin. The gene expressions at the hypothalamus-pituitary-gonadal axis were examined on day 73 of the experiment (average age on day 177) during the prepubescent phase. An HE diet resulted in accelerated body weight gain and back-fat thickness at the P2 point compared with LE gilts during the prepubescent phase. Gilts that were fed HE diets attained puberty 12 d earlier than LE gilts, and a larger proportion of HE gilts reached puberty at day 180 or 190 of age. A postmortem analysis revealed a promoted development of the uterus and ovary tissue that was characterized by a 53.7% and 29.5% increase in the uterine and ovary weight, respectively, and an increased length of the uterine horn and oviduct tissue in HE gilts. Real-time quantitative polymerase chain reaction revealed that HE gilts had higher Kiss-1, G protein-coupled receptor 54, gonadotropin-releasing hormone and estrogen receptor α mRNA expression levels in the hypothalamic anteroventral periventricular nucleus; the leptin receptor mRNA expression level was higher in the hypothalamic arcuate nucleus and ovary tissue; the insulin-like growth factor-1 receptor expression was higher in the pituitary and

  19. Ovarian reaction and estrus manifestation in delayed puberty gilts after treatment with equine chorionic gonadotropin

    Directory of Open Access Journals (Sweden)

    Stančić Ivan B

    2012-08-01

    Full Text Available Abstract Background Prolonged pre-insemination anestrus (i.e. delayed puberty is a major contributing factor for culling up to 30% of the replacement gilts at large breeding farm units in Vojvodina. It is imperative to determine if these gilts are acyclic (prepubertal or cyclic, but just fail to exhibit behavioural estrus. Recent investigations demonstrate that treatment with equine chorionic gonadotropin (eCG can increase the diestrous phase duration in sexually mature gilts. Based on these finding, the aim of the present studies was to determine the reproductive status of delayed puberty gilts following injection with eCG. Methods Two experiments were conducted on a swine breeding farm in Vojvodina. In Exp. 1, 20 prepubertal (acyclic gilts, and 120 sexually mature (cyclic gilts were injected with a single injection of 400 IU eCG + 200 IU human chorionic gonadotropin (hCG or with 1000 IU eCG (cyclic gilts, at d5, d11 or d17 after spontaneous estrus detection, to determine their ovarian reaction and induced estrus manifestation. In Exp. 2, sixty delayed puberty gilts (estrus not detected until 8 month of age, av. 258 days were culled from breeding herd and slaughtered to determine their reproductive status based on ovarian anatomical features. The second group of gilts (n = 60 was treated with a single 1000 IU eCG injection to determine their reproductive status, based on the interval between eCG injection to estrus detection and duration. The data were analyzed by descriptive statistics, t-test, analysis of variance and Duncan’s test in the software package Statistics 10th. Results Ovulations were induced in 90% of acyclic (sexually immature and, on average, 93.3% of cyclic (sexually mature gilts after the eCG injection. On average, 4 days after the eCG injection, estrus was detected in 85% of the treated acyclic (sexually immature gilts and in 95% (19/20 of the cyclic (sexually mature gilts, treated with eCG on day 17

  20. Examination of U.S. Puberty Timing Data from 1940 to 1994 for Secular Trends: Panel Findings

    Science.gov (United States)

    Five articles based on "The Role of Environmental Factors on the Onset and Progression of Puberty" expert panel workshop findings were published as a Supplement to Pediatrics on Feb. 1, 2008. This workshop, sponsored by EPA, NIEHS, and Serono International and held in November o...

  1. Spring Chinook Salmon Interactions Indices and Residual/Precocious Male Monitoring in the Upper Yakima Basin; Yakima/Klickitat Fisheries Project Monitoring and Evaluation, 2004-2005 Annual Report.

    Energy Technology Data Exchange (ETDEWEB)

    Pearsons, Todd N.; Johnson, Christopher L. (Washington Department of Fish and Wildlife, Olympia, WA); James, Brenda B. (Cascade Aquatics, Ellensburg, WA)

    2005-05-01

    This report examines some of the factors that can influence the success of supplementation, which is currently being tested in the Yakima Basin using upper Yakima stock of spring chinook salmon. Supplementation success in the Yakima Basin is defined relative to four topic areas: natural production, genetics, ecological interactions, and harvest (Busack et al. 1997). The success of spring chinook salmon supplementation in the Yakima Basin is dependent, in part, upon fish culture practices and favorable physical and biological conditions in the natural environment (Busack et al. 1997; James et al. 1999; Pearsons et al., 2003; Pearsons et al. 2004). Shortfalls in either of these two topics (i.e., failure in culturing many fish that have high long-term fitness or environmental conditions that constrain spring chinook salmon production) will cause supplementation success to be limited. For example, inadvertent selection or propagation of spring chinook that residualize or precocially mature may hinder supplementation success. Spring chinook salmon that residualize (do not migrate during the normal migration period) may have lower survival rates than migrants and, additionally, may interact with wild fish and cause unacceptable impacts to non-target taxa. Large numbers of precocials (nonanadromous spawners) may increase competition for females and significantly skew ratios of offspring sired by nonanadromous males, which could result in more nonanadromous spring chinook in future generations. Conditions in the natural environment may also limit the success of spring chinook supplementation. For example, intra or interspecific competition may constrain spring chinook salmon production. Spring chinook salmon juveniles may compete with each other for food or space or compete with other species that have similar ecological requirements. Monitoring of spring chinook salmon residuals, precocials, prey abundance, carrying capacity, and competition will help researchers

  2. The CXC chemokine cCAF stimulates precocious deposition of ECM molecules by wound fibroblasts, accelerating development of granulation tissue

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    Li Qi-Jing

    2002-06-01

    Full Text Available Abstract Background During wound repair, fibroblasts orchestrate replacement of the provisional matrix formed during clotting with tenascin, cellular fibronectin and collagen III. These, in turn, are critical for migration of endothelial cells, keratinocytes and additional fibroblasts into the wound site. Fibroblasts are also important in the deposition of collagen I during scar formation. The CXC chemokine chicken Chemotactic and Angiogenic Factor (cCAF, is highly expressed by fibroblasts after wounding and during development of the granulation tissue, especially in areas where extracellular matrix (ECM is abundant. We hypothesized that cCAF stimulates fibroblasts to produce these matrix molecules. Results Here we show that this chemokine can stimulate precocious deposition of tenascin, fibronectin and collagen I, but not collagen III. Studies in culture and in vivo show that tenascin stimulation can also be achieved by the N-terminal 15 aas of the protein and occurs at the level of gene expression. In contrast, stimulation of fibronectin and collagen I both require the entire molecule and do not involve changes in gene expression. Fibronectin accumulation appears to be linked to tenascin production, and collagen I to decreased MMP-1 levels. In addition, cCAF is chemotactic for fibroblasts and accelerates their migration. Conclusions These previously unknown functions for chemokines suggest that cCAF, the chicken orthologue of human IL-8, enhances healing by rapidly chemoattracting fibroblasts into the wound site and stimulating them to produce ECM molecules, leading to precocious development of granulation tissue. This acceleration of the repair process may have important application to healing of impaired wounds.

  3. Excess androgen during puberty disrupts circadian organization in female rats.

    Science.gov (United States)

    Sellix, Michael T; Murphy, Zachary C; Menaker, Michael

    2013-04-01

    Circadian clocks have been described in each tissue of the hypothalamo-pituitary-ovarian axis. Although a role for the clock in the timing of ovulation is indicated, the impact of diseases that disrupt fertility on clock function or the clocks' role in the etiology of these pathologies has yet to be fully appreciated. Polycystic ovary syndrome (PCOS) is a particularly devastating endocrinopathy, affecting approximately 10% of women at childbearing age. Common features of PCOS are a polycystic ovary, amenorrhea, and excess serum androgen. Approximately 40% of these women have metabolic syndrome, including hyperinsulinemia, dyslipidemia, and hyperleptinemia. It has been suggested that excess androgen is a critical factor in the etiology of PCOS. We have examined the effects of androgen excess during puberty on the phase of circadian clocks in tissues of the metabolic and hypothalamo-pituitary-ovarian axes. Female period1-luciferase (per1-luc) rats were exposed to androgen (5α-dihydrotestosterone [DHT]) or placebo for 4-6 weeks (short term) or 9-15 weeks (long term). As expected, DHT-treated animals gained more weight than controls and had disrupted estrous cycles. At the end of treatment, tissues, including the liver, lung, kidney, white adipose, cornea, pituitary, oviduct, and ovarian follicles, were cultured, and per1-luc expression in each was recorded. Analysis of per1-luc expression revealed that DHT exposure increased phase distribution of multiple oscillators, including ovarian follicles, liver, and adipose, and altered phase synchrony between animals. These data suggest that excess androgen during puberty, a common feature of PCOS, negatively affects internal circadian organization in both the reproductive and metabolic axes.

  4. Radiographic and clinical aspects of endodonty of the central incisor, in maxilla: a case report

    International Nuclear Information System (INIS)

    Panella, J.; Freitas, A. de; Freitas, C. de

    1989-01-01

    The authors in the current report introduce a study of the present features when of agenesis of dental elements on the maxilla-mandibular complex. They relate a case of right upper central incisor's hypodontia, describing its clinical and radiographic appearances. Through a large revision of literature about this field, they found out that a disappearance of this element on the human dentition is rare, associating for this: genetic, familiar, nutrient, hormonal, infections and traumatic agents. Finally, they alert for the fact that an accurate clinical examination, complemented by a exact radiographic survey, will make possible a precocious diagnosis and execution of more efficient therapeutic manipulations that reduce the problems of functional, esthetic and phonetics order. (author)

  5. Progression of puberty after initiation of androgen therapy in patients with idiopathic hypogonadotropic hypogonadism

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    Bindu Kulshreshtha

    2013-01-01

    Full Text Available Background: Onset of puberty in boys usually occurs by 14 years of age. Some boys may exhibit delayed sexual maturation till about 17-18 years of age. However, pubertal onset beyond 18 years of age is exceedingly rare. Materials and Methods: Patients diagnosed as idiopathic hypogonadotropic hypogonadism (IHH who had onset of puberty (increase in testicular volume >10 ml while on androgen therapy were studied. These patients were evaluated prospectively. Results: There were nine subjects that were included in the study. The pre-therapy testicular volumes ranged from 3 to 6 ml. Luteinizing hormone (LH levels increased from 1.2 ± 0.96 to 2.8 ± 1.0 IU/L, follicular stimulating hormone (FSH levels increased from 1.5 ± 0.79 to 3.5 ± 1.9 IU/L, and testosterone increased from 0.36 ± 0.16 to 3.4 ± 2.1 ng/ml. Three out of nine patients had testosterone levels below 3 ng/ml. Conclusion: Our present study indicates that pubertal development can occur in patients presenting with hypogonadotropic hypogonadism after 18 years of age. However, acquired pubertal status may be subnormal

  6. A Critical Analysis of UNESCO's International Technical Guidance on School-Based Education for Puberty and Sexuality

    Science.gov (United States)

    Goldman, Juliette D. G.

    2012-01-01

    Preparing children and adolescents for sexual safety and reproductive responsibility lies at the heart and purpose of puberty/sexuality education. The document of International Technical Guidance released by UNESCO in December 2009 aims to provide an evidence-based and rights-based platform offering children and adolescents vital knowledge about…

  7. How SNP chips will advance our knowledge of factors controlling puberty and aid in selecting replacement females

    Science.gov (United States)

    The promise of genomic selection is that genetic potential can be accurately predicted from genotypes. Simple deoxyribonucleic acid (DNA) tests might replace low accuracy predictions based on performance and pedigree for expensive or lowly heritable measures of puberty and fertility. The promise i...

  8. Comparison of learning ability and memory retention in altricial (Bengalese finch, Lonchura striata var. domestica) and precocial (blue-breasted quail, Coturnix chinensis) birds using a color discrimination task.

    Science.gov (United States)

    Ueno, Aki; Suzuki, Kaoru

    2014-02-01

    The present study sought to assess the potential application of avian models with different developmental modes to studies on cognition and neuroscience. Six altricial Bengalese finches (Lonchura striata var. domestica), and eight precocial blue-breasted quails (Coturnix chinensis) were presented with color discrimination tasks to compare their respective faculties for learning and memory retention within the context of the two developmental modes. Tasks consisted of presenting birds with discriminative cues in the form of colored feeder lids, and birds were considered to have learned a task when 80% of their attempts at selecting the correctly colored lid in two consecutive blocks of 10 trials were successful. All of the finches successfully performed the required experimental tasks, whereas only half of the quails were able to execute the same tasks. In the learning test, finches required significantly fewer trials than quails to learn the task (finches: 13.5 ± 9.14 trials, quails: 45.8 ± 4.35 trials, P memory retention tests, which were conducted 45 days after the learning test, finches retained the ability to discriminate between colors correctly (95.0 ± 4.47%), whereas quails did not retain any memory of the experimental procedure and so could not be tested. These results suggested that altricial and precocial birds both possess the faculty for learning and retaining discrimination-type tasks, but that altricial birds perform better than precocial birds in both faculties. The present findings imply that developmental mode is an important consideration for assessing the suitability of bird species for particular experiments. © 2013 Japanese Society of Animal Science.

  9. Poor bone health in underprivileged Indian girls: an effect of low bone mass accrual during puberty.

    Science.gov (United States)

    Khadilkar, Anuradha V; Sanwalka, Neha J; Kadam, Nidhi S; Chiplonkar, Shashi A; Khadilkar, Vaman V; Mughal, M Zulf

    2012-05-01

    A socio-economic gradient exists for most reasons of morbidity and mortality including delayed puberty in lower (LSES) as compared to higher (HSES) socio-economic stratum and puberty is an important factor affecting bone status in children and adolescents. Thus, a cross-sectional study was conducted on 195 age-matched pairs of girls (8-17years) from LSES and HSES in Pune City, India to assess the hypothesis that socio-economic factors working through late puberty would have a negative association with bone status of adolescents. Height, weight and Tanner stage were assessed. Total body bone mineral content (TBBMC), total body bone area (TBBA), total body bone mineral density (TBBMD), lean body mass (LBM) and total body fat mass (TBFM) were measured using GE Lunar DPX Pro Pencil Beam DXA (Wisconsin, USA) scanner. Mean TBBMC (1172±434g), TBBA (1351±356cm(2)), TBBMD (0.846±0.104g/cm(2)), LBM (21,622±5306g) and TBFM (7746±5194g) in LSES girls were significantly lower than that of HSES girls [TBBMC (1483±525g), TBBA (1533±380cm(2)), TBBMD (0.942±0.119g/cm(2)), LBM (24,308±5829g) and TBFM (12,196±7404g)] (pbone parameters. The differences in TBBMC, TBBA, LBM and TBFM between the 2 socio-economic strata at Tanner stage I were not significant (p>0.1) whereas there were significant differences in these parameters from Tanner stages II to V (pbone health in adolescent girls from the lower socio-economic stratum. Copyright © 2012 Elsevier Inc. All rights reserved.

  10. Effect of exogenous prolactin on ultrastructure of pinealocyte in female pigs during puberty

    International Nuclear Information System (INIS)

    Przybylska, B.; Dusza, L.; Lewczuk, B.; Ciesielska-Myszka, L.

    1994-01-01

    Influence of the administration of prolactin to female swine during puberty on the ultrastructure of pinealocytes has been examined by means of morphometric analysis. Prolactin administration for 15 consecutive days resulted in a decrease in the cytoplasmic dense bodies type MBB-2, lysosomes and multivesicular bodies. Some differences in structure of pinealocytes were also observed. Prolactin appeared to stimulate the process of transformation of cytoplasmic dense bodies. (author). 28 refs, 5 figs

  11. Effect of exogenous prolactin on ultrastructure of pinealocyte in female pigs during puberty

    Energy Technology Data Exchange (ETDEWEB)

    Przybylska, B.; Dusza, L.; Lewczuk, B.; Ciesielska-Myszka, L. [Akademia Rolniczo-Technicza, Olsztyn (Poland)

    1994-12-31

    Influence of the administration of prolactin to female swine during puberty on the ultrastructure of pinealocytes has been examined by means of morphometric analysis. Prolactin administration for 15 consecutive days resulted in a decrease in the cytoplasmic dense bodies type MBB-2, lysosomes and multivesicular bodies. Some differences in structure of pinealocytes were also observed. Prolactin appeared to stimulate the process of transformation of cytoplasmic dense bodies. (author). 28 refs, 5 figs.

  12. McCune-Albright syndrome: radiological and MR findings.

    Science.gov (United States)

    Yongjing, G; Huawei, L; Zilai, P; Bei, D; Hao, J; Kemin, C

    2001-01-01

    McCune-Albright syndrome (MAS) is a non-inherited disorder due to the GNAS1 gene mutation. The syndrome is characterized with the triad of polyostotic fibrous dysplasia, pigmented skin lesions, endocrinopathy, and precocious puberty. We report the case of a 14-year-old boy, presenting with sclerotic type of polyostotic fibrous dysplasia. Radiological methods including plain X-ray film, MR and whole body bone scintigraphy suggested the diagnosis of MAS. MRI provided more directly perceived images and it was more sensitive in demonstrating the lesion: its shape, contents, especially the size of the affected region. Histopathological study and the identification of mutant gene finally confirmed the diagnostic result.

  13. The effects of nutrition, puberty and dancing on bone density in adolescent ballet dancers.

    Science.gov (United States)

    Burckhardt, Peter; Wynn, Emma; Krieg, Marc-Antoine; Bagutti, Carlo; Faouzi, Mohamed

    2011-06-01

    Ballet dancers have on average a low bone mineral content (BMC), with elevated fracture-risk, low body mass index (BMI) for age (body mass index, kg/m2), low energy intake, and delayed puberty. This study aims at a better understanding of the interactions of these factors, especially with regard to nutrition. During a competition for pre-professional dancers we examined 127 female participants (60 Asians, 67 Caucasians). They averaged 16.7 years of age, started dancing at 5.8 years, and danced 22 hours/week. Assessments were made for BMI, BMC (DXA), and bone mineral apparent density (BMAD) at the lumbar spine and femoral neck, pubertal stage (Tanner score), and nutritional status (EAT-40 questionnaire and a qualitative three-day dietary record). BMI for age was found to be normal in only 42.5% of the dancers, while 15.7% had a more or less severe degree of thinness (12.6% Grade2 and 3.1% Grade 3 thinness). Menarche was late (13.9 years, range 11 to 16.8 years). Food intake, evaluated by number of consumed food portions, was below the recommendations for a normally active population in all food groups except animal proteins, where the intake was more than twice the recommended amount. In this population, with low BMI and intense exercise, BMC was low and associated with nutritional factors; dairy products had a positive and non-dairy proteins a negative influence. A positive correlation between BMAD and years since menarche confirmed the importance of exposure to estrogens and the negative impact of delayed puberty. Because of this and the probable negative influence of a high intake of non-dairy proteins, such as meat, fish, and eggs, and the positive association with a high dairy intake, ballet schools should promote balanced diets and normal weight and should recognize and help dancers avoid eating disorders and delayed puberty caused by extensive dancing and inadequate nutrition.

  14. Puberty: Maturation, Timing and Adjustment, and Sexual Identity Developmental Milestones among Lesbian, Gay, and Bisexual Youth

    Science.gov (United States)

    Grossman, Arnold H.; Foss, Alexander H.; D'Augelli, Anthony R.

    2014-01-01

    This study examined pubertal maturation, pubertal timing and outcomes, and the relationship of puberty and sexual identity developmental milestones among 507 lesbian, gay, and bisexual youth. The onset of menarche and spermarche occurred at the mean ages of 12.05 and 12.46, respectively. There was no statistically significant difference in…

  15. Postnatal penile growth concurrent with mini-puberty predicts later sex-typed play behavior: Evidence for neurobehavioral effects of the postnatal androgen surge in typically developing boys.

    Science.gov (United States)

    Pasterski, Vickie; Acerini, Carlo L; Dunger, David B; Ong, Ken K; Hughes, Ieuan A; Thankamony, Ajay; Hines, Melissa

    2015-03-01

    The masculinizing effects of prenatal androgens on human neurobehavioral development are well established. Also, the early postnatal surge of androgens in male infants, or mini-puberty, has been well documented and is known to influence physiological development, including penile growth. However, neurobehavioral effects of androgen exposure during mini-puberty are largely unknown. The main aim of the current study was to evaluate possible neurobehavioral consequences of mini-puberty by relating penile growth in the early postnatal period to subsequent behavior. Using multiple linear regression, we demonstrated that penile growth between birth and three months postnatal, concurrent with mini-puberty, significantly predicted increased masculine/decreased feminine behavior assessed using the Pre-school Activities Inventory (PSAI) in 81 healthy boys at 3 to 4years of age. When we controlled for other potential influences on masculine/feminine behavior and/or penile growth, including variance in androgen exposure prenatally and body growth postnally, the predictive value of penile growth in the early postnatal period persisted. More specifically, prenatal androgen exposure, reflected in the measurement of anogenital distance (AGD), and early postnatal androgen exposure, reflected in penile growth from birth to 3months, were significant predictors of increased masculine/decreased feminine behavior, with each accounting for unique variance. Our findings suggest that independent associations of PSAI with AGD at birth and with penile growth during mini-puberty reflect prenatal and early postnatal androgen exposures respectively. Thus, we provide a novel and readily available approach for assessing effects of early androgen exposures, as well as novel evidence that early postnatal aes human neurobehavioral development. Copyright © 2015. Published by Elsevier Inc.

  16. Williams Syndrome and 15q Duplication: Coincidence versus Association.

    Science.gov (United States)

    Khokhar, Aditi; Agarwal, Swashti; Perez-Colon, Sheila

    2017-01-01

    Williams syndrome is a multisystem disorder caused by contiguous gene deletion in 7q11.23, commonly associated with distinctive facial features, supravalvular aortic stenosis, short stature, idiopathic hypercalcemia, developmental delay, joint laxity, and a friendly personality. The clinical features of 15q11q13 duplication syndrome include autism, mental retardation, ataxia, seizures, developmental delay, and behavioral problems. We report a rare case of a girl with genetically confirmed Williams syndrome and coexisting 15q duplication syndrome. The patient underwent treatment for central precocious puberty and later presented with primary amenorrhea. The karyotype revealed 47,XX,+mar. FISH analysis for the marker chromosome showed partial trisomy/tetrasomy for proximal chromosome 15q (15p13q13). FISH using an ELN -specific probe demonstrated a deletion in the Williams syndrome critical region in 7q11.23. To our knowledge, a coexistence of Williams syndrome and 15q duplication syndrome has not been reported in the literature. Our patient had early pubertal development, which has been described in some patients with Williams syndrome. However, years later after discontinuing gonadotropin-releasing hormone analogue treatment, she developed primary amenorrhea.

  17. LH Dynamics in Overweight Girls with Premature Adrenarche and Slowly Progressive Sexual Precocity

    Directory of Open Access Journals (Sweden)

    Rosenfield RobertL

    2010-08-01

    Full Text Available Background. Excess adiposity and premature adrenarche (PA are risk factors for the development of polycystic ovary syndrome (PCOS. Methods. Girls with slowly progressive precocious breast development, who were overweight and had PA (SPPOPA, 6.2–8.2 years, , overweight PA (6.6–10.8 years, , and overweight premenarcheal controls (OW-PUB, 10.6–12.8 years, underwent hormonal sleep testing and GnRH agonist (GnRHag and ACTH tests. Results. Despite an insignificant sleep-related increase in LH and prepubertal baseline hormone levels, SPPOPA peak LH and estradiol responses to GnRHag were intermediate between those of PA and OW-PUB, the LH being significantly different from both. Conclusions. GnRHag tests indicate that SPPOPA is a slowly progressive form of true puberty with blunted LH dynamics. These results argue against the prepubertal hyperandrogenism of excess adiposity or PA enhancing LH secretion or causing ovarian hyperandrogenism prior to menarche. Excess adiposity may contribute to both the early onset and slow progression of puberty.

  18. Childhood family disruption and adult height: is there a mediating role of puberty?

    OpenAIRE

    Sheppard, P; Garcia, JR; Sear, R

    2015-01-01

    BACKGROUND AND OBJECTIVES: Childhood family background is known to be associated with child growth and development, including the onset of puberty, but less is known about the influence of childhood family disruption on outcomes in later life. Given the associations between early family disruption and childhood development, we predicted that there may be long-term health-relevant consequences of childhood disruption. METHODOLOGY: Using data from a large U.S. interview sample (n=16,207), we te...

  19. Intervention levels in a precocious detection program for breast cancer and evaluation of four participant units; Niveles de intervencion en un programa de deteccion precoz del cancer de mama y evaluacion de cuatro unidades participantes

    Energy Technology Data Exchange (ETDEWEB)

    Carrera M, F.; Velazquez M, S.; Manzano M, F.J.; Sanchez S, J. [Hospital `Juan Ramon Jimenez` Ronda Norte s/n 21005. Huelva, Espana (Spain)

    1998-12-31

    It is presented the basis to make a cost benefit analysis for a breast cancer precocious detection program and consequently the keys for its optimization from the radiological point of view. Taking this as a reference it is made an exhaustive quality control to four mammographic unities which were participating or they were candidates to participate in a breast cancer precocious detection program. Also it is presented its results. It is followed the protocol for quality control in mammography in Spain obtaining values for the measurement of twelve interesting parameters. It should be maintained the standard breast dose about 1 mGy/ image. It should be available a 24 x 30 cm portacassete and considering the utilization of a single projection by breast. (Author)

  20. Spring Chinook Salmon Interactions Indices and Residual/Precocial Monitoring in the Upper Yakima Basin; Yakima/Klickitat Fisheries Project Monitoring and Evaluation, 2001-2002 Annual Report.

    Energy Technology Data Exchange (ETDEWEB)

    Pearsons, Todd N.; James, Brenda B.; Johnson, Christopher L. (Washington Department of Fish and Wildlife, Olympia, WA)

    2003-05-01

    This report examines some of the factors that can influence the success of supplementation, which is currently being tested in the Yakima Basin using upper Yakima stock of spring chinook salmon. Supplementation success in the Yakima Basin is defined relative to four topic areas: natural production, genetics, ecological interactions, and harvest (Busack et al. 1997). The success of spring chinook salmon supplementation in the Yakima Basin is dependent, in part, upon fish culture practices and favorable physical and biological conditions in the natural environment (Busack et al. 1997). Shortfalls in either of these two topics (i.e., failure in culturing many fish that have high long-term fitness or environmental conditions that constrain spring chinook salmon production) will cause supplementation success to be limited. For example, inadvertent selection or propagation of spring chinook that residualize or precocially mature may hinder supplementation success. Spring chinook salmon that residualize (do not migrate during the normal migration period) may have lower survival rates than migrants and, additionally, may interact with wild fish and cause unacceptable impacts to non-target taxa. Large numbers of precocials (nonanadromous spawners) may increase competition for females and significantly skew ratios of offspring sired by nonanadromous males, which could result in more nonanadromous spring chinook in future generations. Conditions in the natural environment may also limit the success of spring chinook supplementation. For example, intra or interspecific competition may constrain spring chinook salmon production. Spring chinook salmon juveniles may compete with each other for food or space or compete with other species that have similar ecological requirements. Monitoring of spring chinook salmon residuals, precocials, prey abundance, carrying capacity, and competition will help researchers interpret why supplementation is working or not working (Busack et al

  1. The significant effects of puberty on the genetic diathesis of binge eating in girls.

    Science.gov (United States)

    Klump, Kelly L; Culbert, Kristen M; O'Connor, Shannon; Fowler, Natasha; Burt, S Alexandra

    2017-08-01

    Recent data show significant phenotypic and genetic associations between ovarian hormones and binge eating in adulthood. Theories of hormonal risk focus on puberty and the possibility that hormone activation induces changes in genetic effects that then lead to differential risk for binge eating in postpuberty and adulthood. Although this theory is difficult to test in humans, an indirect test is to examine whether genetic influences on binge eating increase during the pubertal period in girls. Prior work has shown pubertal increases in genetic influences on overall disordered eating symptoms, but no study to date has examined binge eating. The present study was the first to examine these increases for binge eating. Participants included 1,568 female twins (aged 8-25 years) from the Michigan State University Twin Registry. Binge eating and pubertal development were assessed with self-report questionnaires. Twin moderation models showed significant linear increases in genetic effects from prepuberty (5%) to postpuberty (42%), even after controlling for the effects of age and body mass index. Results provide critical support for increased genetic influences on binge eating during puberty. Additional studies are needed to identify hormonal mechanisms and fully test contemporary models of ovarian hormone risk. © 2017 Wiley Periodicals, Inc.

  2. Genetic variability of the length of postpartum anoestrus in Charolais cows and its relationship with age at puberty

    Directory of Open Access Journals (Sweden)

    Ménissier François

    2000-07-01

    Full Text Available Abstract Fertility records (n = 1 802 were collected from 615 Charolais primiparous and multiparous cows managed in an experimental herd over an 11-year period. The objectives of the study were to describe the genetic variability of the re-establishment of postpartum reproductive activity and the relationship with body weight (BW and body condition score (BCS at calving and age at puberty. The length of postpartum anoestrus was estimated based on weekly blood progesterone assays and on twice daily detection of oestrus behaviour. The first oestrus behaviour was observed 69 days (± 25 days s.d. post-calving and the first positive progesterone measurement (≥ 1 ng mL-1 was observed at 66 days (± 22 days s.d. for the group of easy-calving multiparous suckling cows. Estimates of heritability and repeatability were h2 = 0.12 and r = 0.38 respectively, for the interval from calving to first oestrus (ICO. Corresponding values were h2 = 0.35 and r = 0.60 for the interval from calving to the first positive progesterone test (ICP. The genetic correlation between both criteria was high (rg = 0.98. The genetic relationships between postpartum intervals and BW and BCS of the female at calving were negative: the genetic aptitude to be heavier at calving and to have high body reserves was related to shorter postpartum intervals. A favourable genetic correlation between age at puberty and postpartum intervals was found (rg between 0.45 and 0.70. The heifers which were genetically younger at puberty also had shorter postpartum intervals.

  3. Effect of melatonin implants on the incidence and timing of puberty in female red deer (Cervus elaphus).

    Science.gov (United States)

    Asher, G W; Archer, J A; Ward, J F; Scott, I C; Littlejohn, R P

    2011-02-01

    A study was conducted to test the hypotheses that exogenous melatonin treatment of 11-13 month-old red deer hinds: (1) advances the timing of first ovulation, (2) increases the proportion of individuals attaining puberty at ∼16 months of age, and (3) reduces the live-weight threshold for attainment of first pregnancy. A total of 3901 rising-2-year-old (R₂) hinds within two herds (A and B) across two years either received single melatonin implants on two occasions in summer (n=1399) or were untreated controls (n=2502). Hinds were joined with stags from mid January to mid May, and were subjected to real-time rectal ultrasonography in early June to assess pregnancy status (proxy for puberty attainment) and foetal age for conception date assignment. Live-weights were recorded for each hind in January (12 months of age) as a proxy for weight at puberty. Melatonin treatment of hinds was associated with a significant advancement in mean conception dates in both herds in both years (Pmelatonin treatment was associated with higher conception rates to first ovulation (P0.05); for every 10kg increase in live-weight conception date was advanced by an average of 1.3 days. In Herd A, melatonin treatment was associated with significantly higher pregnancy rates in both years (90.3% vs. 78.0% in Year 1 and 84.4% vs. 57.1% in Year 2; Pmelatonin treatment was to increase the pregnancy rate of hinds of low body-mass. In Year 1, at 60kg live-weight a logit regression model indicated a pregnancy rate of 52% for untreated hinds and 83% for treated hinds. At 105kg the rate for both cohorts was 90%. In Herd B, melatonin treatment was associated with higher conception rates in both years but these differences were not significant following correction for slight differences in mean live-weight (P>0.05). The study has demonstrated that factors influencing puberty attainment in R₂ red deer hinds can vary between populations. In Herd A, in which body mass of hinds immediately prior to

  4. Rathke′s cyst with ectopic neurohypophysis presenting as severe short stature with delayed puberty

    OpenAIRE

    Deep Dutta; Ajitesh Roy; Sujoy Ghosh; Pradip Mukhopadhyay; Ranen Dasgupta; Satinath Mukhopadhyay; Subhankar Chowdhury

    2012-01-01

    Ectopic neurohypophysis (EN) is found in nearly half of children with growth hormone deficiency (GHD). Rathke's cyst (RC) is uncommon in children and when present, hypopituitarism is found in nearly half of them. We present a fourteen and half-year-old girl with severe short stature and delayed puberty who on evaluation was found to have GHD, secondary hypocortisolism, and hypogonadism. Imaging revealed hypoplastic anterior pituitary, stalk agenesis, EN at tuber cinereum and intrapituitary RC...

  5. The Impact of Puberty and Sexual Activity upon the Health and Education of Adolescent Girls and Boys.

    Science.gov (United States)

    Brooks-Gunn, J.

    1987-01-01

    Sex equity issues which are emphasized in this article include: (a) how boys and girls negotiate reproductive transitions; (b) how male and female sexual maturity is treated differently by parents, educators, and society; and (c) how the consequences of puberty and sexual behavior may differ for boys and girls. (IAH)

  6. Integration of genomic resources to uncover pleiotropic regions associated with age at puberty and reproductive longevity in sows

    Science.gov (United States)

    Commercial and experimental genetic resources were used to investigate genetic pleiotropic factors that influence age at puberty, litter-size and reproductive longevity. The phenotypes were complemented by high-density genotyping and whole genome and RNA sequencing. The SNPs from Porcine SNP60 BeadA...

  7. [Final height in symptomatic boys with late-onset adrenal hyperplasia (LOCAH), treated with glucocorticoids. Clinical cases].

    Science.gov (United States)

    Pasqualini, Titania; Alonso, Guillermo; Fernández, Cecilia; Buzzalino, Noemí; Dain, Liliana

    2013-04-01

    Although corticoid replacement is recommended for those late-onset adrenal hyperplasia with clinical manifestations, asymptomatic patients do not need treatment. We describe clinical features at diagnosis, treatment, and growth till adult- height, in 4 boys. At diagnosis, age ranged from 9.2-11.6 years. The initial symptoms/signs were: precocious pubarche (n = 2), accelerated bone age (n = 1) and precocious puberty (n = 1). All of them presented elevated 17 hydroxyprogesterone levels and were compound heterozygotes carrying p.V281L mutation. Since, at diagnosis, bone age was significantly advanced for chronological age (13.1 ± 0.5 vs. 10.2 ± 1.1 p = 0.008), hydrocortisone therapy was initiated. During follow-up, mean height Z score decreased 1.4 ± 0.4 SDS (p = 0.007), though adult mean height was not different from target height (-0.39 ± 0.7 vs. -0.04 ± 0.5 SDS, p = 0.054). In conclusion, in 4 symptomatic patients, accurate treatment of late-onset adrenal hyperplasia led to an adult mean height not different from target height. Advanced bone age at diagnosis and the loss of height during pubertal development suggest the need of therapy.

  8. Genomic analyses identify hundreds of variants associated with age at menarche and support a role for puberty timing in cancer risk

    DEFF Research Database (Denmark)

    Day, Felix R; Thompson, Deborah J; Helgason, Hannes

    2017-01-01

    The timing of puberty is a highly polygenic childhood trait that is epidemiologically associated with various adult diseases. Using 1000 Genomes Project-imputed genotype data in up to ∼370,000 women, we identify 389 independent signals (P ... pubertal development. In Icelandic data, these signals explain ∼7.4% of the population variance in age at menarche, corresponding to ∼25% of the estimated heritability. We implicate ∼250 genes via coding variation or associated expression, demonstrating significant enrichment in neural tissues. Rare...... variants near the imprinted genes MKRN3 and DLK1 were identified, exhibiting large effects when paternally inherited. Mendelian randomization analyses suggest causal inverse associations, independent of body mass index (BMI), between puberty timing and risks for breast and endometrial cancers in women...

  9. Exposure to phthalates: reproductive outcome and children health. A review of epidemiological studies.

    Science.gov (United States)

    Jurewicz, Joanna; Hanke, Wojciech

    2011-06-01

    Phthalates are a family of industrial chemicals that have been used for a variety of purposes. As the potential consequences of human exposure to phthalates have raised concerns in the general population, they have been studied in susceptible subjects such as pregnant women, infants and children. This article aims at evaluating the impact of exposure to phthalates on reproductive outcomes and children health by reviewing most recent published literature. Epidemiological studies focusing on exposure to phthalates and pregnancy outcome, genital development, semen quality, precocious puberty, thyroid function, respiratory symptoms and neurodevelopment in children for the last ten years were identified by a search of the PubMed, Medline, Ebsco, Agricola and Toxnet literature bases. The results from the presented studies suggest that there are strong and rather consistent indications that phthalates increase the risk of allergy and asthma and have an adverse impact on children's neurodevelopment reflected by quality of alertness among girls, decreased (less masculine) composite score in boys and attention deficit hyperactivity disorder. Results of few studies demonstrate negative associations between phthalate levels commonly experienced by the public and impaired sperm quality (concentration, morphology, motility). Phthalates negatively impact also on gestational age and head circumference; however, the results of the studies were not consistent. In all the reviewed studies, exposure to phthalates adversely affected the level of reproductive hormones (luteinizing hormone, free testosterone, sex hormone-binding globulin), anogenital distance and thyroid function. The urinary levels of phthalates were significantly higher in the pubertal gynecomastia group, in serum in girls with premature thelarche and in girls with precocious puberty. Epidemiological studies, in spite of their limitations, suggest that phthalates may affect reproductive outcome and children health

  10. Constitutive luteinizing hormone receptor signaling causes sexual dysfunction and Leydig cell adenomas in male mice.

    Science.gov (United States)

    Hai, Lan; Hiremath, Deepak S; Paquet, Marilène; Narayan, Prema

    2017-05-01

    The luteinizing hormone receptor (LHCGR) is necessary for fertility, and genetic mutations cause defects in reproductive development and function. Activating mutations in LHCGR cause familial male-limited precocious puberty (FMPP). We have previously characterized a mouse model (KiLHRD582G) for FMPP that exhibits the same phenotype of precocious puberty, Leydig cell hyperplasia, and elevated testosterone as boys with the disorder. We observed that KiLHRD582G male mice became infertile by 6 months of age, although sperm count and motility were normal. In this study, we sought to determine the reason for the progressive infertility and the long-term consequences of constant LHCGR signaling. Mating with superovulated females showed that infertile KiLHRD582G mice had functional sperm and normal accessory gland function. Sexual behavior studies revealed that KiLHRD582G mice mounted females, but intromission was brief and ejaculation was not achieved. Histological analysis of the reproductive tract showed unique metaplastic changes resulting in pseudostratified columnar epithelial cells with cilia in the ampulla and chondrocytes in the penile body of the KiLHRD582G mice. The infertile KiLHRD582G exhibited enlarged sinusoids and a decrease in smooth muscle content in the corpora cavernosa of the penile body. However, collagen content was unchanged. Leydig cell adenomas and degenerating seminiferous tubules were seen in 1-year-old KiLHRD582G mice. We conclude that progressive infertility in KiLHRD582G mice is due to sexual dysfunction likely due to functional defects in the penis. © The Authors 2017. Published by Oxford University Press on behalf of Society for the Study of Reproduction. All rights reserved. For permissions, please journals.permissions@oup.com.

  11. An approach to constitutional delay of growth and puberty

    Directory of Open Access Journals (Sweden)

    Ashraf T Soliman

    2012-01-01

    Full Text Available Constitutional delay of growth and puberty is a transient state of hypogonadotropic hypogonadism associated with prolongation of childhood phase of growth, delayed skeletal maturation, delayed and attenuated pubertal growth spurt, and relatively low insulin-like growth factor-1 secretion. In a considerable number of cases, the final adult height (Ht does not reach the mid-parental or the predicted adult Ht for the individual, with some degree of disproportionately short trunk. In the pre-pubertal male, testosterone (T replacement therapy can be used to induce pubertal development, accelerate growth and relieve the psychosocial complaints of the adolescents. However, some issues in the management are still unresolved. These include type, optimal timing, dose and duration of sex steroid treatment and the possible use of adjunctive or alternate therapy including: oxandrolone, aromatase inhibitors and human growth hormone.

  12. Gitelman syndrome manifesting in early childhood and leading to delayed puberty: a case report

    Directory of Open Access Journals (Sweden)

    Raza Farhan

    2012-10-01

    Full Text Available Abstract Introduction Gitelman syndrome is an inherited autosomal recessive renal salt-wasting disorder. It presents with variable clinical symptoms including muscle weakness and fatigue, and the diagnosis is based on metabolic alkalosis, hypokalemia, hypomagnesemia and hypocalciuria. It is usually diagnosed incidentally in early adulthood. There are rare cases of Gitelman syndrome presenting in early childhood; however, to the best of our knowledge it has not previously been associated with delayed puberty. Case presentation A 17-year-old South Asian man with recurrent episodes of generalized muscle weakness, fatigue and cramps from the age of two years was admitted for further workup. Before the age of 12 years, the episodes had been mild, but they then got progressively worse. Other symptoms include polyuria, polydipsia, nocturia, paresthesia and occasional watery diarrhea. He also had a history of short stature, poor weight gain and delayed developmental landmarks. His family history was unremarkable except for the consanguineous marriage of his parents. An examination revealed a thin and lean man with blood pressure of 95/60mmHg. His height and weight were below the third percentile and his sexual development was at Tanner Stage II. Laboratory work revealed serum sodium of 124mmol/L, potassium 2.4mmol/L, calcium 6.5mmol/L and magnesium of 1.2mg/dL. His testosterone level was low (0.85ng/mL, normal for his age 2.67 to 10.12ng/mL with normal levels of luteinizing hormone and follicle-stimulating hormone. The sex hormone findings were attributed to delayed puberty. A 24-hour urinary analysis revealed decreased excretion of calcium (25.9mg/24 hours. Based on the findings of hypokalemic metabolic alkalosis without hypertension, severe hypomagnesemia and hypocalciuria, a diagnosis of Gitelman syndrome was made. Treatment was started with oral supplementation of potassium, magnesium and calcium along with spironolactone and liberal salt intake

  13. Gitelman syndrome manifesting in early childhood and leading to delayed puberty: a case report.

    Science.gov (United States)

    Raza, Farhan; Sultan, Mubashar; Qamar, Khola; Jawad, Ali; Jawa, Ali

    2012-10-02

    Gitelman syndrome is an inherited autosomal recessive renal salt-wasting disorder. It presents with variable clinical symptoms including muscle weakness and fatigue, and the diagnosis is based on metabolic alkalosis, hypokalemia, hypomagnesemia and hypocalciuria. It is usually diagnosed incidentally in early adulthood. There are rare cases of Gitelman syndrome presenting in early childhood; however, to the best of our knowledge it has not previously been associated with delayed puberty. A 17-year-old South Asian man with recurrent episodes of generalized muscle weakness, fatigue and cramps from the age of two years was admitted for further workup. Before the age of 12 years, the episodes had been mild, but they then got progressively worse. Other symptoms include polyuria, polydipsia, nocturia, paresthesia and occasional watery diarrhea. He also had a history of short stature, poor weight gain and delayed developmental landmarks. His family history was unremarkable except for the consanguineous marriage of his parents. An examination revealed a thin and lean man with blood pressure of 95/60mmHg. His height and weight were below the third percentile and his sexual development was at Tanner Stage II. Laboratory work revealed serum sodium of 124mmol/L, potassium 2.4mmol/L, calcium 6.5mmol/L and magnesium of 1.2mg/dL. His testosterone level was low (0.85ng/mL, normal for his age 2.67 to 10.12ng/mL) with normal levels of luteinizing hormone and follicle-stimulating hormone. The sex hormone findings were attributed to delayed puberty. A 24-hour urinary analysis revealed decreased excretion of calcium (25.9mg/24 hours). Based on the findings of hypokalemic metabolic alkalosis without hypertension, severe hypomagnesemia and hypocalciuria, a diagnosis of Gitelman syndrome was made. Treatment was started with oral supplementation of potassium, magnesium and calcium along with spironolactone and liberal salt intake. Diagnosis of Gitelman syndrome is usually made incidentally

  14. Start of puberty on heifers of Ecuadorian highlands by determination of progesterone hormone by radio-immuno analysis (RIA)

    International Nuclear Information System (INIS)

    Villalba, Patricio; Alarcon, Mariana; Utreras, Gina; Vazconez, L.

    1994-01-01

    The objective of this research was to determine the beginning of the puberty in Heifers of two Ecuadorian highland farms, observing the weight, age and height in which appeared levels of progesterone hormone that were significant, the samples were analyzed throughout the radioimmunoassay technique (RIA). The experiment was performed with twenty-eight Heifers Holstein Friesan half-breed of 6 to 9 months old, fourteen each farm. The blood samples were collected each eight days, additional data as weight and height were compiled each fifteen days and fecal samples were taken each thirty days. The Heifers were separate the trial when showed levels of progesterone equal or superior 0,5 ng/ml blood serum as an indicative that the ovarian physiology has begun. The age was highly significant in the groups, showing the puberty the Heifers of the farm ''A'' 5.47 months before that the farm B, for the parameters weight and height that was not significant

  15. GENOMICS SYMPOSIUM: Using genomic approaches to uncover sources of variation in age at puberty and reproductive longevity in sows

    Science.gov (United States)

    Genetic variants associated with traits such as age at puberty and litter size could provide insight into the underlying genetic sources of variation impacting sow reproductive longevity and productivity. Genomewide characterization and gene expression profiling were used using gilts from the Univer...

  16. Magnetic resonance imaging of hypothalamic hamartoma

    Energy Technology Data Exchange (ETDEWEB)

    Kanazawa, Junichi; Uozumi, Tohru; Sakoda, Katsuaki; Yamanaka, Masami; Kihara, Mikio; Nishi, Yoshikazu; Kagawa, Yoshihiro; Kajima, Toshio.

    1988-05-01

    Magnetic resonance (MR) findings of two patients with a hypothalamic hamartoma are discussed. The two girls showed clinical symptoms and endocrinological signs of precocious puberty. MR imaging was of diagnostic value superior to that of CT in the demonstration of the characteristic location of this tumor and relationships to the neighboring structures because of its multi-dimensional utility. Although it has been reported that CT showed this lesion as isodense to the grey matter with and without injection of contrast medium, MR imaging depicted the lesion as a high signal intensity area on T2-weighted images in both patients. MR imaging is a useful method for the evaluation of the hypothalamic hamartoma.

  17. Endocrinologic complications of cranial irradiation. Complications endocriniennes de l'irradiation cranienne

    Energy Technology Data Exchange (ETDEWEB)

    Brauner, R.; Rappaport, R. (Hopital des Enfants Malades 75 - Paris (FR))

    1989-09-01

    Cranial irradiation has become one of the leading causes of growth hormone (GH) deficiency. The risk and time of onset of GH deficiency depend mainly on the dose delivered to the hypothalamo-pituitary region: GH deficiency is infrequent after doses under 20 grays and nearly constant after doses above 45 grays. For a given dose, a younger age at the time of irradiation and administration of the dose over a shorter time period increase the risk of GH deficiency. GH secretion can be adequately evaluated using rapid stimulation tests and is usually well correlated with growth, except in patients with radiation-induced precocious puberty or growth delay due to radiation-induced cartilage lesions.

  18. Endocrinologic complications of cranial irradiation

    International Nuclear Information System (INIS)

    Brauner, R.; Rappaport, R.

    1990-01-01

    Cranial irradiation has become one of the leading causes of growth hormone (GH) deficiency. The risk and time of onset of GH deficiency depend mainly on the dose delivered to the hypothalamo-pituitary region: GH deficiency is infrequent after doses under 20 grays and nearly constant after doses above 45 grays. For a given dose, a younger age at the time of irradiation and administration of the dose over a shorter time period increase the risk of GH deficiency. GH secretion can be adequately evaluated using rapid stimulation tests and is usually well correlated with growth, except in patients with radiation-induced precocious puberty or growth delay due to radiation-induced cartilage lesions [fr

  19. Endocrinologic complications of cranial irradiation

    International Nuclear Information System (INIS)

    Brauner, R.; Rappaport, R.

    1989-01-01

    Cranial irradiation has become one of the leading causes of growth hormone (GH) deficiency. The risk and time of onset of GH deficiency depend mainly on the dose delivered to the hypothalamo-pituitary region: GH deficiency is infrequent after doses under 20 grays and nearly constant after doses above 45 grays. For a given dose, a younger age at the time of irradiation and administration of the dose over a shorter time period increase the risk of GH deficiency. GH secretion can be adequately evaluated using rapid stimulation tests and is usually well correlated with growth, except in patients with radiation-induced precocious puberty or growth delay due to radiation-induced cartilage lesions [fr

  20. Pituitary and ovarian abnormalities demonstrated by CT and ultrasound in children with features of the McCune-Albright syndrome

    International Nuclear Information System (INIS)

    Rieth, K.G.; Comite, F.; Shawker, T.H.; Cutler, G.B. Jr.

    1984-01-01

    In a random series of 97 children referred to the National Institutes of Health with a presumptive diagnosis of precocious puberty, eight girls were found to have features of the McCune-Albright syndrome, including fibrous dysplasia of bone and/or skin lesions resembling cafe au lait spots. Radiographic evaluation of these patients included computed tomography of the head and pelvic ultrasound. The pituitary glands were suspicious for abnormality in five of the eight girls. Seven girls underwent pelvic ultrasound, and in all of them the ovaries were considered to be abnormal for their chronological age; in addition, two had functional ovarian cysts. The role of diagnostic radiological studies in the diagnosis of this syndrome is discussed