Low AMH: what it does and does not tell you about your fertility

AMH measures ovarian reserve, meaning quantity. It says very little about egg quality, and almost nothing about your chance of conceiving naturally this year.

Why this comes up so often

It is one of the three or four questions asked in almost every consultation, and the answer given elsewhere is frequently either too vague to act on or too optimistic to trust. This article sets out what is actually known, where the evidence is genuinely uncertain, and what that means for the decision in front of you.

What the evidence shows

Published data in reproductive medicine is often reported in ways that flatter the reporting clinic — rates per transfer rather than per cycle started, selected patient groups, and outcomes measured at pregnancy rather than live birth. When you read a figure, the first question is always: the numerator and denominator of what, exactly?

Applied carefully to an individual, the same evidence usually supports a narrower and more useful answer than the headline suggests. That is the work of a consultation — translating population data into a realistic expectation for your age, your reports and your history.

What to do with this

Bring the specific numbers from your own reports to your next appointment and ask what they mean for you rather than for patients in general. If you have already had treatment elsewhere, bring the cycle sheets too — the doses used and the response recorded are often the most informative documents in the whole file.

Written and reviewed by Dr. Kriti Tiwari, MBBS, MS (Obstetrics & Gynaecology), FNB (Reproductive Medicine). Last reviewed 2026-09-15.