Correlation coefficients between number of oocytes retrieved and AFC, AMH and FSH N2 - 3, age were 0.62; 0.48; - 0.39; - 0.22, respectively; and the correlation coefficients between number of oocytes retrieved and E2N7, number of follicles ≥12 mm on day 7, number of follicles ≥14 mm on day 9 were 0.58; 0.3; 0.7, respectively.