What Is the Difference Between AMH and FSH?

AMH and FSH measure different aspects of ovarian function. AMH reflects ovarian reserve and remains stable throughout the menstrual cycle, making it a consistent indicator. FSH, on the other hand, assesses ovarian function and must be measured on specific cycle days. High FSH levels indicate reduced ovarian reserve but can fluctuate, whereas AMH provides a more direct measure of the remaining egg supply.