AMH is produced by the small, growing follicles in the ovaries, so the level in blood roughly tracks how many eggs remain. Unlike FSH, it can be tested on any day of the cycle.
What a low AMH means — and what it doesn't
A low AMH suggests a smaller remaining egg pool and can predict a lower response to IVF stimulation. It does not by itself mean pregnancy is impossible, and it says little about the quality of the eggs — a woman with low AMH and good egg quality can still conceive. As I tell my patients: low AMH can feel scary, but it's not the full story.
How it's used
AMH helps plan treatment: choosing medicine doses for IVF stimulation, setting realistic expectations about egg numbers, and informing decisions about fertility preservation (egg freezing) when someone wants to delay pregnancy.