AMH and polycystic ovary syndrome: After vitamin D3 supplementation, serum AMH levels significantly decreased in anovulatory PCOS patients[Standardized Mean Difference (SMD) -0.53, 95% CI -0.91 to -0.15, p < 0.007], while they significantly increased in ovulatory non-PCOS women (SMD 0.49, 95% CI 0.17 to 0.80, p = 0.003) [54].