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2. Inhibin A and inhibin B in women with polycystic ovarian syndrome during treatment with FSH to induce mono-ovulation.

Author

Anderson, R. A., Groome, N. P., and Baird, D. T.

Subjects
POLYCYSTIC ovary syndrome, FOLLICLE-stimulating hormone, LUTEINIZING hormone, ESTRADIOL, INHIBIN, ENDOCRINOLOGY
Abstract

OBJECTIVE Polycystic ovary syndrome (PCOS) is characterized by the presence of numerous small antral follicles arrested at a diameter of less than 10 mm. As development of large antral follicle(s) can be stimulated by the administration of FSH, it has been suggested that the arrest of follicle development is due to a relative lack of or resistance to FSH. We have measured the concentration of FSH and LH and the ovarian hormones oestradiol, inhibin A and B, in relation to the dynamics of follicular development in women with PCOS under basal conditions and during treatment with FSH. DESIGN The concentrations of FSH, LH, oestradiol, inhibin A and B were measured in women with PCOS who were untreated (n = 9) or following progesterone-induced menses (10 cycles in six women) and control women on day 3 of a normal cycle (n = 10). Serial measurements of the same hormones were made during induction of ovulation with low dose of exogenous FSH in the women with PCOS who had been treated with progesterone. The dynamics of follicle development were measured by serial pelvic ultrasound examinations during treatment with FSH in PCOS and in the follicular phase of control cycles. PATIENTS Nine anovulatory untreated women with PCOS were compared with 10 normal women and six women with PCOS undergoing FSH treatment. RESULTS The concentrations of inhibin B and LH were higher in both groups of women with PCOS than in normal control women on day 3. In untreated women with PCOS the concentration of inhibin A was also significantly elevated compared to control women (P < 0.01) but not in women pretreated with progesterone. Basal concentrations of oestradiol were also significantly higher in women with PCOS than in the early follicular phase of the normal cycle. There were no significant differences in the concentration of FSH between the groups. Treatment of women with PCOS with low doses of FSH stimulated the development of a single dominant follicle which had an identical rate of... [ABSTRACT FROM AUTHOR]

Published
1998
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