What it measures
- AMH (Anti-Müllerian Hormone)
What is AMH?
Anti-Müllerian Hormone is made by the small follicles in your ovaries. The more follicles you have, the higher your AMH, so it’s used as a guide to your ovarian reserve: roughly how many eggs remain. AMH naturally falls with age.
What AMH can and can’t tell you
- It’s a good guide to egg quantity, and helps fertility clinics plan IVF and egg freezing.
- It doesn’t measure egg quality, which depends mainly on age.
- A low AMH doesn’t mean you can’t conceive naturally, and a normal AMH doesn’t guarantee you will.
- AMH is often high in PCOS, because there are many small follicles.
AMH is stable across your cycle, so unlike most hormone tests you can book any day.
Who it’s for
- Planning when to start a family
- Considering egg freezing or IVF
- Irregular periods or suspected PCOS
- Curiosity about your fertility
How to prepare
- Drink plenty of water beforehand; it makes the sample quicker and easier to take.
- You don’t need to fast.
- You can test on any day of your cycle.
- Hormonal contraception can lower AMH slightly; let us know if you use it.
AMH Blood Test: your questions
What is a normal AMH level for my age?
AMH varies widely and falls with age. Your report shows your result against age-related ranges, which is more useful than a single “normal” figure.
Can I have an AMH test on the pill?
Yes, but hormonal contraception can lower AMH slightly, so your result may underestimate your reserve. Let us know if you use it.
Information on this page is general and doesn’t replace advice from your GP, midwife or consultant. If you feel unwell or are worried about symptoms, contact your GP, call NHS 111 or, in an emergency, 999.