AMH and vitamin D deficiency: Serum levels of AMH were compared between 1561 women with vitamin D insufficiency/deficiency and 924 women with sufficient vitamin D status using 8 studies7,15,28,40,49,54 yielded non-significant difference (WMD 0.02 ng/mL; 95% CI − 0.40 to 0.43; P = 0.929) with evidence of heterogeneity (I2 = 63.2%, P = 0.008) (Fig. 3).