Anti-Müllerian Hormone (AMH)

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated May 11, 2026

AMH is a glycoprotein produced by granulosa cells of small antral ovarian follicles. Its serum level reflects how many small follicles are currently active in the ovaries. That is a snapshot of this cycle's follicular activity, not a fixed inventory or a permanent verdict on reproductive potential.

What AMH does not measure is equally important. It does not measure egg quality, follicle quality, or how well ovulation is functioning. For natural conception, one competent follicle per cycle is the target. A single well-developed, well-supported follicle is sufficient.

AMH's significance as a "low" number is largely anchored to protocols requiring multiple egg retrieval. That is the IVF context. An RRM clinician asks a different question: what is this cycle's follicle doing? The total pool size is a starting point for the workup, not the answer.

A low AMH result is a diagnostic signal. The question is why. Age is one factor. But autoimmune conditions, prior ovarian surgery, endometriosis, vitamin D deficiency, and thyroid dysfunction can all reduce AMH before age alone explains it. AMH can change. A meta-analysis found DHEA supplementation significantly raised serum AMH in women with diminished ovarian reserve.¹ Treating correctable contributors is the first step.

AMH also has a ceiling problem. In PCOS, AMH is often markedly elevated because many small follicles accumulate without maturing. A high number is not simply reassuring. It reflects arrested follicle development that warrants investigation.

In RRM practice, AMH is interpreted alongside AFC, cycle chart patterns, timed hormonal panels, and a follicle maturation study when indicated. AMH also has a developmental role: it is produced by Sertoli cells in males during fetal development and drives regression of the Müllerian ducts. This dual origin is why AMH appears in male factor evaluation as a marker of Sertoli cell function. The number alone is not the diagnosis. It is the beginning of the workup.

This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.