AMH Levels Explained: Normal Range by Age & What It Means
Also known as: Anti-Mullerian hormone, Müllerian inhibiting substance, ovarian reserve test, AMH blood test
AMH (anti-Müllerian hormone) is produced by small follicles in the ovaries, so a blood test gives an estimate of your ovarian reserve — roughly how many eggs remain. It naturally declines with age. A commonly cited normal AMH for women of reproductive age is about 1.0–4.0 ng/mL, but ranges shift substantially with age. Importantly, AMH reflects egg quantity, not egg quality, and cannot on its own predict whether or when you'll conceive.
AMH normal range
| Category | Range (ng/mL) |
|---|---|
| Typical (reproductive age) | ~1.0–4.0 ng/mLInterpretation is strongly age-dependent |
| Age ~25–30 | ~2.5–6.3 ng/mLHigher earlier in reproductive years |
| Age ~35 | ~1.5–4.0 ng/mL |
| Age ~40+ | often < 1.0 ng/mLNormal to be lower with age |
| Low / diminished reserve | < ~1.0 ng/mLInterpreted with age and other tests |
| High | > ~4.0 ng/mLCan accompany PCOS |
| Reference ranges vary by lab | Use your own reportAssays and units differ between labs |
Reference ranges vary by laboratory. Use the range printed on your own report as the definitive comparison.
What high AMH can mean
- Polycystic ovary syndrome (PCOS), which tends to raise AMH
- A larger pool of small ovarian follicles
- Younger reproductive age (AMH is naturally higher earlier)
What low AMH can mean
- Diminished ovarian reserve, often a normal part of aging
- Approaching menopause
- Prior ovarian surgery, chemotherapy, or radiation
- Certain genetic or autoimmune conditions affecting the ovaries
What to do about an abnormal result
- Compare your value to the range on your own report and interpret it for your age — AMH means very different things at 25 versus 40.
- AMH estimates egg quantity, not quality, and does not guarantee or rule out pregnancy on its own.
- It's interpreted alongside age, antral follicle count on ultrasound, FSH, and estradiol by a fertility specialist.
- Don't self-diagnose from one number — if fertility is a concern, discuss the full picture with a reproductive endocrinologist.
Understand your own results
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Frequently asked questions
What is a normal AMH level by age?
AMH is highly age-dependent: it's often around 2.5–6.3 ng/mL in the mid-to-late 20s, roughly 1.5–4.0 ng/mL around age 35, and frequently below 1.0 ng/mL by the early 40s. Because ranges vary by lab and assay, interpret your result against your report and your age.
Does a low AMH mean I can't get pregnant?
No. A low AMH suggests a smaller remaining egg supply, but it reflects quantity, not egg quality, and many people with low AMH conceive naturally. It cannot predict whether or when you'll get pregnant, so it should be interpreted with age and other tests by a specialist.
What does a high AMH level indicate?
A high AMH often reflects a large number of small ovarian follicles and is commonly seen in polycystic ovary syndrome (PCOS). It can also simply reflect being younger. A high value is interpreted alongside symptoms, ultrasound findings, and other hormone tests.
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Medically reviewed by Antonieta Rueda, MD and Kyle R. Toth, MD · Last reviewed July 6, 2026
This article is for informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or your lab results.