The short explanation
AMH, anti-Mullerian hormone, is made by the small follicles in the ovaries. Women with PCOS often have many small follicles, so their AMH is frequently higher than average. That is why some labs add a note suggesting PCOS when AMH is high. But AMH alone is not enough to diagnose PCOS. Diagnosis usually needs at least two of three features: irregular or absent ovulation, signs of higher androgens such as excess hair or acne or raised levels on a blood test, and polycystic-looking ovaries on a scan. Some guidelines now accept a high AMH in place of the scan in adults, but it still needs to be combined with your symptoms. AMH levels also vary between labs and with age.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- A high AMH generally means a good number of eggs in reserve, which is not a bad sign for fertility in itself.
- If you are trying to conceive, what matters more is whether you are ovulating regularly. Your doctor can check this with your cycle history, blood tests or scans.
- Other conditions, such as thyroid problems or high prolactin, may also need to be ruled out.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell whether you have PCOS. Your doctor needs to look at your cycles, symptoms and other tests together.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Does my high AMH, along with my other results, suggest PCOS?
- Am I ovulating regularly?
- Do I need other tests to rule out other causes?
- How does this affect our plans to conceive?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Book an appointment soon
- See a doctor within a few days if you have a positive pregnancy test with pain or bleeding.
Raise it at a routine appointment
- Book a routine appointment to discuss your AMH result together with your cycle history.
- See a doctor if you have been trying for a year, or six months if you are over 35.
Sources
The evidence this explanation is built on.
- Polycystic ovary syndrome (PCOS) NHS
- Polycystic ovary syndrome World Health Organization
Who wrote and reviewed this
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- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
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No corrections have been made since this answer was first published.
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