Fertility · 5 min read

The AMH test: what your number means, and what it does not

Few blood tests cause as much worry as AMH. Couples are often handed a single number, told it is "low", and leave believing their chances are gone. That is rarely the whole story. Here is what the test measures, and what it cannot tell you.

What AMH is

Anti-Müllerian hormone is made by the small follicles in the ovaries — the ones that hold the eggs for future cycles. The more of these follicles there are, the higher the AMH level tends to be. So AMH is an estimate of ovarian reserve: roughly how many eggs remain.

It can be checked on any day of the cycle. Labs report it in different units (ng/mL or pmol/L), so a number from one lab cannot always be compared directly with another.

What a low AMH means — and does not mean

A low AMH suggests fewer eggs remain. It matters most when planning IVF, because it helps predict how the ovaries will respond to stimulation medicines, and so guides the dose and the protocol.

It does not measure egg quality, which depends mostly on age. And it does not, on its own, tell you whether you can conceive naturally: a woman ovulating every month needs only one good egg each cycle. Many women with a low AMH conceive.

What a high AMH can mean

A high AMH is often seen with polycystic ovaries. It is not a sign of better fertility in itself, and in IVF it calls for a gentler stimulation to avoid over-response.

Why one number is not a diagnosis

AMH is read alongside your age, an ultrasound count of follicles, your cycle history, your partner's semen analysis and how long you have been trying. A decision about treatment should come from all of these together, never from AMH alone.

When to come in

If you are under 35 and have been trying for a year, or 35 or over and trying for six months, or you already have a worrying report, a fertility evaluation for both partners is the sensible next step. Bring every report you have.

Written and reviewed by Dr. Hardik Vansjaliya, M.S. (Obs & Gynaec), D.M.A.S., F.M.A.S., Fellow in IVF, M.B.A. (Healthcare), Gujarat Medical Council Reg. G/24936. Published 2026-10-05. Last checked 2026-10-05.

This article is general information, not medical advice about your own situation. If something here applies to you, come and talk to us.