Testing for AMH (Anti-Mullerian Hormone) levels is one of the first fertility tests we perform when a woman inquires about her fertility, because it can help determine how many eggs she has left in her ovaries.
AMH levels are determined through a blood test that can conveniently be done on any day during your menstrual cycle. AMH is made by primordial follicles in the ovaries, or eggs that are not yet ready to respond to hormones, grow or ovulate. The higher your AMH level, the more eggs you have in reserve that may grow into mature eggs some day.
Women with high AMH levels respond extraordinarily well to fertility medications; they can be called “hyper-responders.” However, in women with extremely high AMH levels, there may be many small eggs in the ovaries, but the high AMH levels could be inhibiting ovulation. Women with low AMH levels may have fewer eggs in their ovaries, so only a few eggs grow, even under the influence of strong fertility medications. Your doctor will use this information to customize your dosing of fertility stimulation medications, which can help maximize your response during treatment.
It’s important to understand that AMH levels DO NOT correlate directly with pregnancy rates. Rather, AMH levels are one vital factor that can help to more accurately determine your ovarian age and how many eggs your fertility doctor has to work with.