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Hypogonadism in Prader-Willi syndrome from birth to adulthood: a 28-year experience in a single centre
Sakina Kherra1, Wendy Forsyth Paterson2, Filiz Mine Cizmecioğlu3
1CHU Parnet Hopital, Algiers, Algeria.
Insights
Prader-Willi syndrome (PWS) patients show invariable hypogonadism. Hormone replacement is underutilized, necessitating trials of sex steroids to address treatment gaps and behavioral concerns.
Area of Science:
- Endocrinology
- Genetics
- Pediatrics
Background:
- Prader-Willi syndrome (PWS) is characterized by significant hypogonadism.
- Current strategies for hormone replacement therapy in PWS are not well-defined.
Purpose of the Study:
- To assess the gonadal status and treatment outcomes in individuals with PWS.
- To evaluate the effectiveness of hormone replacement in PWS patients.
Main Methods:
- Retrospective analysis of 93 patients (35 female, 56 male) with PWS from a Scottish clinic (1991-2019).
- Clinical assessment of gonadal and pubertal status, pelvic ultrasound, and gonadotropin levels compared to age-matched controls.
- Evaluation of hormone replacement therapy, including estrogen and androgen treatments, and their outcomes.
Main Results:
- Females: Limited pubertal development and menarche in most; immature uterine configuration and low follicular counts noted. Estrogen replacement was given to only 5 patients.
- Males: High prevalence of cryptorchidism (96%). hCG therapy achieved testicular descent in some. Pubertal progression was delayed or arrested in many; elevated FSH levels observed in some stages. Testosterone levels were low in older males.
- Hormone replacement therapy was underutilized in both sexes, with androgen therapy stopped in some males due to behavioral issues.
Conclusions:
- Prader-Willi syndrome invariably involves hypogonadism, yet hormone replacement is infrequently administered.
- Further research, including double-blind, placebo-controlled trials of sex steroids, is needed to establish optimal treatment protocols and address behavioral concerns.
Background:
Hypogonadism is a key feature of Prader-Willi syndrome (PWS) but clear strategies for hormone replacement are lacking.
Objective:
To evaluate the gonadal status and outcome in patients attending a Scottish PWS clinic from 1991 to 2019.
Methods:
In 93 (35F:56M) patients, median follow-up 11.2 years, gonadal and pubertal status were assessed clinically. Pelvic ultrasound findings and basal/stimulated gonadotrophins were compared with age-matched controls.
Results:
Females:of 22 patients aged > 11, 9 had reached B4-5, while 5 were still at B2-3, and 6 remained prepubertal. Eight patients experienced menarche aged 9.8-21.4 years, none with a normal cycle. Uterine length and ovarian volumes were normal but uterine configuration remained immature, with low follicular counts. Gonadotrophins were unremarkable, serum oestradiol 129 (70-520) pmol/L. Only 5 patients received oestrogen replacement. Males:fifty-four (96%) patients were cryptorchid (9 unilateral). Weekly hCG injections resulted in unilateral/bilateral descent in 2/1 of 25 patients. Of 37 boys aged > 11, 14 (9 with failed/untreated bilateral cryptorchidism) failed to progress beyond G1, 15 arrested at G2-3 (testes 3-10 mL), and 8 reached G4-5. Gonadotrophins were unremarkable except in boys at G2-5 in whom FSH was elevated: 12.3/27.3 vs 3.25/6.26 U/L in controls (P < 0.001). In males aged > 13, testosterone was 3.1 (0.5-8.4) nmol/L. Androgen therapy, given from 13.5 to 29.2 years, was stopped in 4/24 patients owing to behavioural problems.
Conclusion:
Despite invariable hypogonadism, few females and only half the males with PWS in this study received hormone replacement. Double-blind placebo-controlled crossover trials of sex steroids are required to address unproven behavioural concerns.
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