Objective: To assess gonadotrophin secretion, ovarian steroid production and ovarian reserve in PCOS
women during the onset of reproductive decline, in order to characterize their ovarian function at this
age.
Study design: Forty PCOS patients and 35 healthy women (35–40 years of age) were included. Clinical
history, anthropometry, transvaginal ultrasound and a leuprolide acetate test (10 mg/kg s.c.) were
performed. Gonadotrophins, steroid hormones, SHBG, inhibin B and AMH were determined.
Results: Basal and peak LH levels were similar in both groups. Basal and peak FSH levels were
significantly higher in the control group. Androgens, peak oestradiol, ovarian volume, antral follicle
count and AMH levels were significantly higher in PCOS patients.
Conclusion: These observations suggest that during late reproductive age, gonadotrophin secretion in
women with PCOS is clearly different from that observed in control women and may also differ from that
of younger PCOS patients. New features like normal LH and lower FSH levels associated with a higher
ovarian reserve may give a different reproductive profile to these women.
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This work was supported by grants from the National Fund for
Scientific and Technological Research (Fondecyt) 1110864, the
Chilean Endocrine and Diabetes Society (SOCHED 2009-05) and by
the Alexander von Humboldt Foundation. We would like to thank
Dr. Gabriel Cavada, Ph.D., Department of Public Health, School of
Medicine, University of Chile, for his help with the statistical
analysis of this study.