CYP19A1 and polycystic ovary syndrome: Treatment with KH (0.42 ± 0.02), clomiphene (0.46 ± 0.02), combined KH + metformin (0.48 ± 0.01), and combined KH + clomiphene (0.5 ± 0.01) significantly increased the Cyp19a1 mRNA expression (p < 0.05) compared to the untreated PCOS rats (0.094 ± 0.01).