Sonographic assessment of ovarian reserve. Its correlation with outcome of in vitro fertilization cycles.

Ovarian reserve is a crucial factor for normal ovarian response and the achievement of pregnancy after in vitro fertilization (IVF). Recently, the study of morphological markers by means of ultrasonographic counting of antral follicles (AFC) has proved useful. The present prospective study included 327 consecutive IVF patients who had a basal ultrasound scan of their ovarian reserve during the early follicular phase and had a first IVF cycle between 1 and 3 months later.