ENO2 and polycystic ovary syndrome: In addition, the Gpx1 expression was significantly higher in 50 μg/ml NSE-treated group versus untreated oocytes in both control (1.8 ± 0.06 vs 1.33 ± 0.06, p = 0.043) and PCOS (1.47 ± 0.08 vs 1.03 ± 0.03, p = 0.015) groups (Figure 1).