What is AMH? AMH, or anti-mullerian hormone is a substance produced by granulosa cells in ovarian follicles. It is first made in primary follicles that advance from the primordial follicle stage. At these stages follicles are microscopic and can not be seen by ultrasound. AMH production is highest in preantral and small antral stages (less … Continue reading Anti-Mullerian Hormone Testing of Ovarian Reserve