ENO2 and polycystic ovary syndrome: Percentage rates of fertilization, 2-cell, 8-cell, and blastocyst formation of control and PCOS mice oocytes cultured in maturation medium, supplemented with 0, 1, 50, and 100 μg/ml NSE. NES: Nigella sativa extract; PCOS: Polycystic ovary syndrome. Data are presented as Mean ± SEM. P: P-value between each concentration group of NSE and control (0 μg/ml of NSE) by one-way ANOVA