Age (30.13 ± 2.54 vs 29.77 ± 2.47 years, P = 0.35), the basal FSH level (7.90 ± 1.49 vs 7.83 ± 2.44, 7.83, P = 0.54) or BMI (23.57 ± 2.58 vs 22.48 ± 2.04, P = 0.42) had no significant difference between these two groups, while basal T (0.31 ± 0.20 vs 1.08 ± 0.34, P < 0.01), the basal LH (4.37 ± 1.11 vs 17.05 ± 5.63, P < 0.01) and LH/FSH ratio (0.50 ± 0.21 vs 2.33 ± 0.83, P < 0.01) were increased in the PCOS group. This evidence concerns the gene BRD2 and polycystic ovary syndrome.