INTRODUCTION: Anti-Mullerian Hormone (AMH) was recently introduced as a marker of ovarian reserve in assisted reproduction. The cutoff values of AMH for prediction of poor response have not yet been determined. MATERIAL AND METHODS: Ninety women undergoing their first IVF/ICSI cycle were prospectively included in this clinical, non-interventional study. Baseline AMH, follicle stimulating hormone (FSH) and antral follicle count (AFC) were measured before starting ovarian stimulation. AMH was also measured on day 5 of stimulation and in the follicular fluid of the first aspirated follicle. The predictive value of baseline AMH, day 5 AMH and follicular fluid AMH were assessed comparatively to FSH and AFC for ovarian response. Ovarian response was defined as poor (12 oocytes) or normal (>/=4 oocytes and
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