Women with higher AMH values will tend to have a better response to ovarian stimulation for IVF (in vitro fertilization), with more eggs retrieved. Women with lower AMH have lower antral follicular counts and produce a lower number of oocytes (eggs).
AMH levels probably do not reflect egg quality. Having more eggs at the IVF egg retrieval provides an opportunity for a greater number of eggs to fertilize and develop into embryos. More eggs do not always mean more embryos. Egg quality plays a role in the fertilization and development of embryos. The ultimate goal is to have at least one healthy embryo to transfer back into the uterus.Ovarian reserve begins to decline in the mid to late 30s, and AMH (and hence ovarian reserve) levels tend to be low in women in their 40s.
Age is not always a factor in low AMH however. Some women continue to have high AMH levels into their 40s, while others have declining AMH levels in their 20s or 30s. This can be due to environmental factors such as cancer treatment, or down to inherited genetic causes. It is important to find out the age of menopause in your family because this is often a good guide to the rate of your own fertility decline.