Decoding AMH: what an ovarian reserve test can and cannot tell you
Originally written by Tracey Sainsbury. Updated by femme to reflect current evidence on Anti-Müllerian Hormone (AMH) and ovarian reserve.
AMH is produced by cells in developing ovarian follicles and is widely used as a marker of ovarian reserve. The crucial distinction is that ovarian reserve describes egg quantity, not egg quality.
What does AMH measure?
AMH broadly reflects the pool of small follicles in the ovaries. Fertility clinics often use it alongside age, ultrasound and medical history to help predict how the ovaries may respond to stimulation during IVF or egg freezing.
AMH can usually be measured at different points in the menstrual cycle, although factors such as hormonal contraception can affect interpretation.
What AMH is useful for
Planning fertility treatment
AMH can help clinicians estimate whether ovarian stimulation may produce a lower, average or higher number of eggs and tailor treatment accordingly.
Understanding ovarian reserve
A result can add information about egg quantity when interpreted in the context of age and the rest of a fertility assessment.
What AMH cannot tell you
- It does not directly measure egg quality.
- It cannot tell you exactly how many eggs remain in the ovaries.
- It is a poor stand-alone predictor of whether somebody will conceive naturally.
- A low AMH result does not mean pregnancy is impossible.
- A high AMH result does not guarantee easy conception.
- It should not be used on its own as a general “fertility test” in somebody with no fertility problem.
Why age still matters
Age is a much stronger predictor of reproductive potential than ovarian reserve tests alone. Egg quantity and egg quality are different biological questions, and AMH mainly answers the first.
That is why an AMH result can be clinically useful without being a countdown clock for natural fertility.
If you are trying to conceive
If you have been trying to conceive for a year without conceiving, speak to a GP. The NHS advises seeking help sooner if you are aged 36 or over or already know there may be a fertility problem.
If an AMH test has worried you, discuss the result with a fertility clinician who can interpret it alongside your age, cycle history, ultrasound findings and partner factors rather than reading the number in isolation.
AMH levels and ovarian reserve: common questions
What does AMH mean?
AMH stands for anti-Müllerian hormone. In fertility care, it is used as a marker of ovarian reserve and can help predict how the ovaries may respond to stimulation during assisted conception.
Does AMH tell you your egg count?
It does not count individual eggs. It gives information about ovarian reserve by reflecting the pool of small growing follicles.
Can AMH predict whether I will get pregnant naturally?
No. Current NICE guidance says AMH should not be used to predict clinical pregnancy through spontaneous conception.
Can you increase ovarian reserve or AMH?
There is no proven treatment, diet or supplement that restores the ovarian reserve lost with age. AMH should be interpreted in context with age, medical history and, where relevant, fertility-treatment planning.
The bottom line
AMH is a useful ovarian-reserve marker, especially when planning assisted reproduction. It is not a crystal ball for natural conception and it does not score the quality of your eggs.
If you want to measure AMH at home, the Vitall Anti-Mullerian Hormone Home Test Kit is one option. The result should still be interpreted in context and should not be treated as a stand-alone prediction of natural fertility.
Evidence
ASRM: Testing and interpreting measures of ovarian reserve
NHS: Infertility
