Can an AMH Test Tell You When Menopause Will Start?

An AMH test cannot pinpoint when your menopause will start. Low AMH links to earlier menopause, but predictions can be 2 to 12 years wide.

No, an AMH test cannot tell an individual woman when her menopause will start, although lower anti-Müllerian hormone (AMH) levels are linked to an earlier menopause on average. A 2023 systematic review of 41 studies in Human Reproduction Update found AMH alone could not predict age at menopause precisely, with estimates spanning 2 to 12 years in women under 40.

This article draws on an October 2026 Weizmann Institute study in Nature Medicine, the 2023 Human Reproduction Update review, NICE menopause guideline NG23, and NHS guidance on early menopause, current as of October 2026.

What Does an AMH Test Actually Measure?

An AMH test measures anti-Müllerian hormone, a hormone made by the small follicles in the ovaries, so it reflects ovarian reserve: roughly how many egg-containing follicles remain. AMH falls steadily as menopause approaches. It does not measure fertility in a given month, menopause symptoms, or oestrogen (estrogen) levels.

The 2023 Human Reproduction Update review notes that circulating AMH "reflects the number of follicles remaining in the ovary and declines towards the menopause." Other hormones shift too. Follicle-stimulating hormone (FSH) rises as the ovaries respond less, and oestradiol, the main form of oestrogen, becomes erratic and then falls. How these hormones interact in a regular monthly cycle is explained in the guide to the four phases of the menstrual cycle.

Solu is a women's wellness app that maps cycle-phase-aware guidance across movement, nutrition, sleep, and energy, built for women tracking hormonal, cycle, and premenstrual symptoms. Logging symptoms and cycle changes in Solu turns months of small shifts into trends, which no single blood test can show.

What Did the 2026 Nature Medicine Menopause Study Find?

The 2026 Nature Medicine study found that hormone changes begin more than a decade before the final period, then many body systems shift abruptly at the final period itself. Weizmann Institute researchers analysed about 300 million laboratory tests from two population cohorts, one in the US and one in Israel.

In the Nature Medicine paper, published in October 2026, AMH began an accelerated decline about 15 years before the final period. FSH began rising about 14 years before, and oestradiol began falling about 12 years before. The authors describe a step-like physiological cliff at the final period across endocrine, bone, liver, kidney, and blood fat markers. These changes appeared markedly attenuated in women using hormone therapy, though that link is observational. The PubMed record lists the full abstract. The timelines are population averages, not a personal schedule. Current evidence on hormone therapy is covered in the guide to whether HRT is safe.

Can AMH Predict When Menopause Will Start?

AMH can show whether menopause is likely to come earlier or later than average, but it cannot set a date for one woman. In the 2023 review, 27 studies of 23,835 women linked lower age-specific AMH to earlier menopause. Prediction ranges in women under 40 spanned 2 to 12 years.

Accuracy improves with age, because the time left to predict gets shorter. Very low or undetectable AMH in a young woman may help an earlier diagnosis of premature ovarian insufficiency (POI), when the ovaries stop working normally before 40. For women aged 45 or over, NICE guideline NG23 lists AMH among tests not to use to identify perimenopause or menopause. Weighed together, the Nature Medicine study and the 2023 review point the same way: AMH tracks a population trend well, but it times an individual menopause poorly, so symptoms and cycle patterns remain the practical guide as of 2026.

Which Cycle Changes Say More Than a Single Blood Test?

Changes in the menstrual cycle usually say more about the menopause transition than one AMH result. The NHS says one of the first signs of perimenopause is usually a change to periods, which may come more or less often and become heavier or lighter. Many women ask whether it is normal to have shorter cycles in their early 40s, and often it is.

Signs worth logging alongside cycle day, drawn from the NHS symptom list:

Cycle length: periods arriving more often or less often than usual.
Flow: bleeding becoming heavier or lighter.
Hot flushes and night sweats, including how many nights a week.
Sleep problems, low mood, or brain fog.

A cycle that shifts from 28 days to 22 days over a year, with one 60-day gap, gives a GP more to work with than a single AMH number. Night sweats often disturb sleep first, and Solu's sleep and recovery tracking by cycle phase shows whether rest worsens in certain weeks. Early signs are covered in the guide to when perimenopause starts, and related symptoms in the guide to signs of low oestrogen.

When Should You See a Doctor About Early Menopause Signs?

See a GP if periods become irregular or stop before age 45, which the NHS defines as early menopause, or before 40, defined as premature menopause. Hormone replacement matters here, because menopause before 45 raises the risk of bone and heart problems.

For women under 40, NICE advises diagnosing POI from symptoms plus raised FSH on 2 blood samples taken 4 to 6 weeks apart, not a single test. Any vaginal bleeding after menopause, meaning after 12 months without a period, needs a prompt GP visit, and the NHS says specialist referral should take no more than 2 weeks.

Key Takeaways

AMH reflects ovarian reserve, and lower levels are linked to an earlier menopause on average.
A 2023 review of 41 studies found AMH predictions for women under 40 can span 2 to 12 years.
A 2026 Nature Medicine study found AMH starts falling faster about 15 years before the final period.
NICE advises against AMH testing to identify perimenopause or menopause in women aged 45 or over.