| "Vrouwen helpen hun ovulatie slimmer bij te houden" | 
AMH is produced by small developing follicles, so the level reflects roughly how many are present. In PMOS it is often raised because follicle selection stalls and more small follicles remain. The 2023 Guideline accepts elevated AMH as an alternative to ultrasound for establishing ovarian morphology in adults: one of three diagnostic features, not a diagnosis on its own.
Key takeaways
- Anti-Müllerian hormone (AMH) is produced by small developing follicles, so the level reflects roughly how many are present.
- In polyendocrine metabolic ovarian syndrome (PMOS, formerly PCOS), AMH is often raised because follicle selection stalls and more small follicles remain.
- The 2023 Guideline accepts elevated AMH as an alternative to ultrasound for establishing ovarian morphology in adults.
- It establishes one of three diagnostic features. It does not diagnose the condition by itself.
- It is not recommended for diagnosis in adolescents or within about eight years of a first period.
What is AMH?
A hormone produced by follicles in the ovary while they are still small and developing.1
Because it comes from those follicles specifically, the amount circulating reflects roughly how many of them are present at that time. That is what the test measures: a proxy for a count.
It is a blood test, ordered and interpreted by a clinician.
Why is AMH often higher in PMOS?
Because more small follicles are present.
In a typical cycle, a group of follicles begins developing and one is selected to become dominant; the rest break down. In this condition that selection step does not happen reliably, so several follicles stall at a small size instead of one pulling ahead.1
Those stalled follicles are the ones producing AMH. More of them means more AMH. Our article on why follicles start and stop covers the mechanism in depth.
| Ultrasound | AMH blood test |
|---|---|
| Counts the follicles | Measures what they produce |
So a raised AMH here is not a separate finding from the ovarian appearance on ultrasound. The two are looking at the same thing by different routes. One counts the follicles; the other measures what they produce.
Can AMH diagnose PMOS?
No. It can establish one of three diagnostic features.
Diagnosis in adults requires two of three: clinical or biochemical hyperandrogenism, ovulatory dysfunction, and polycystic ovarian morphology on ultrasound or elevated AMH, after other causes are excluded (DOI: 10.1210/clinem/dgad463).2
- Clinical or biochemical hyperandrogenism
- Ovulatory dysfunction
- Polycystic ovarian morphology on ultrasound or elevated AMH
The guideline accepts elevated AMH as an alternative to ultrasound for that third feature in adults.2 So an AMH result can fill one box. It cannot fill two, and it cannot exclude other causes.
There is also a case where it is not needed at all: where irregular cycles and hyperandrogenism are both present, neither ultrasound nor AMH is required for diagnosis.2
Why isn’t AMH used in adolescents?
Because normally developing ovaries in the years after a first period can look very similar.
The guideline does not recommend AMH for diagnosis in adolescents, or within about eight years of menarche.2 Ovarian morphology and AMH levels in that window overlap substantially with ordinary development, so using them would risk mislabeling typical puberty.
For that group, diagnosis rests on the other two features.
Does a high AMH mean I am more fertile?
This is the most common misunderstanding about the test, and it is worth being careful.
AMH reflects roughly how many small follicles are present.1 In this condition, more are present because selection stalls rather than because anything is being produced differently. It is a count by another route.
What a particular result means for you is a clinical question, not one that can be answered from a number. It depends on your full picture, and it is the sort of thing to ask the clinician who ordered the test.
What is worth resisting is reading a single number as a verdict in either direction. A result is one input to an assessment.
What if my AMH is in the typical range?
An AMH in the typical range does not rule the condition out.
The third diagnostic feature can be established through ultrasound instead, and it is only one of three features, two of which are required.2 Someone with hyperandrogenism and irregular cycles meets the criteria regardless of what AMH shows.
Our article on why you don’t need ovarian cysts covers the same point from the ultrasound side, and it applies equally here.
What this means for tracking with Premom
AMH is a blood test. It is not something an app measures, estimates, or infers, and no pattern in cycle data indicates what an AMH result would be.
What a record of cycle dates over months contributes is information about a different feature entirely (the pattern of your cycles) in a form that is easier to bring to an appointment than to recall.
Premom is an ovulation tracking application. It is not intended to diagnose, treat, cure, or prevent any disease, including PMOS. The information provided is for educational purposes and should not replace consultation with a healthcare provider.
When to talk to a clinician
The information here is general and is not a basis for self-diagnosis. Speak with a clinician if:
- You have an AMH result you do not understand
- You were told an AMH result rules the condition in or out on its own
- You are trying to conceive and have questions about what a result means for you
- Your cycles are consistently long or vary widely from month to month
Frequently asked questions
Not quite. AMH is produced by small developing follicles, so the level reflects roughly how many are present at that time. It is a proxy for a count rather than a direct one, and what a particular result means for you is a clinical question.
A raised AMH establishes one of three diagnostic features. Diagnosis requires two of three, after other causes are excluded (DOI: 10.1210/clinem/dgad463). So an AMH result on its own does not establish the condition, and a clinician assesses it alongside everything else.
Usually not. The guideline accepts elevated AMH as an alternative to ultrasound for establishing ovarian morphology in adults, not as an addition to it. They are two routes to the same diagnostic feature.
Both establish the same feature, so either can be used in adults. Which is chosen depends on availability, what else is being assessed, and what is acceptable to you. It’s a reasonable thing to ask about directly.
AMH is not recommended for diagnosis in adolescents, or within about eight years of a first period (DOI: 10.1210/clinem/dgad463), because normally developing ovaries in that window can look very similar. Diagnosis then rests on the other two features.
About PMOS
Polycystic ovary syndrome was renamed polyendocrine metabolic ovarian syndrome (PMOS) by international consensus published in The Lancet on 12 May 2026.3 A three-year transition runs to 2028, and both names remain in clinical use. Diagnostic criteria did not change, and an existing PCOS diagnosis remains valid.
Reported prevalence varies with the criteria applied; the 2023 International Evidence-Based Guideline reports 10–13% (DOI: 10.1210/clinem/dgad463).2
References
- Strauss JF III, Barbieri RL, eds. Yen & Jaffe’s Reproductive Endocrinology: Physiology, Pathophysiology, and Clinical Management. 8th ed. Elsevier; 2019. ISBN 978-0-323-47912-7.
- Teede HJ, et al. Recommendations from the 2023 International Evidence-Based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab. 2023;108(10):2447–2469. DOI 10.1210/clinem/dgad463 · PMID 37580314. Recommendations 1.4.1, 1.4.6.
- Teede HJ, et al. The Lancet, 12 May 2026. DOI 10.1016/S0140-6736(26)00717-8 · PMID 42119588.
