AMH and polycystic ovary syndrome: AMH serum levels are closely correlated withthe number of early antral follicles in both healthy womenand women with PCOS (5, 28), and it is mostly producedby granulosa cells of follicles from 2 to 9 mm in diameter.Impaired folliculogenesis in PCOS patients may causeexcess accumulation of pre-antral and small antral follicles,which may ultimately lead to an increase in AMH levels.The results of numerous studies show elevated AMH levelsin PCOS patients.