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Journal of Clinical Endocrinology & Metabolism, Vol 71, 748-754, Copyright © 1990 by Endocrine Society

ARTICLES

Correlation between follicular fluid content and the results of in vitro fertilization and embryo transfer. II. Inhibin and aromatase inhibitor activity

P Franchimont, MT Hazee-Hagelstein, C Charlet-Renard, JM Jaspar, A Hazout, J Salat-Baroux, B Schatz and F Demerle
Department of Endocrinology, Centre Hospitalier Universitaire, Sart Tilmin, Belgium.

The inhibin content and aromatase inhibitor activity (AIA) of 72 follicular fluids (FF) obtained from 42 women undergoing in vitro fertilization (IVF) and embryo transfer (ET) were studied as a function of IVF ET outcome. Inhibin levels were determined by bioassay (BA) and RIA; AIA was measured by BA. The inhibin content of follicles characterized as immature by their estradiol (E2) levels and E2/progesterone (P) ratios was significantly lower (P less than 0.05) than that of mature follicles (i.e. leading to pregnancy). The mean AIA for mature follicles were significantly lower than AIA in groups where pregnancy was not obtained. AIA for follicles from which a pregnancy was obtained for each ET was also significantly lower than that in FF characterized as immature of hypermature. The highest E2/AIA and inhibin BA/AIA ratios were associated with the highest incidence of successful IVF ET outcome. No correlation was found between AIA and inhibin, on the one hand, and E2, delta 4-androstenedione, E2/P, and PRL, on the other. However, a positive correlation was found between inhibin (RIA and BA) and P, reflecting the production of inhibin by granulosa cells during luteinization. These studies allowed us to conclude that FF inhibin levels do not differ according to IVF ET outcome, but are an index of follicular maturation. AIA not only constitutes an index of follicular maturation and granulosa cell luteinization, but is of predictive value for IVF ET outcome as E2/AIA and inhibin BA/AIA ratios.


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C.-L. Chang, T.-H. Wang, S.-G. Horng, H.-M. Wu, H.-S. Wang, and Y.-K. Soong
The concentration of inhibin B in follicular fluid: relation to oocyte maturation and embryo development
Hum. Reprod., July 1, 2002; 17(7): 1724 - 1728.
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