AMH and vitamin D deficiency: Furthermore, serum AMH was not different when stratified according to vitamin D status at day 1, vitamin D deficiency (< 25 nmol/L; AMH = 41 pmol/L), insufficiency (25–50 nmol/L; AMH = 41 pmol/L) or sufficiency (> 50 nmol/L; AMH = 38 pmol/L) (Fig. 1B).