AMH (Anti-Müllerian Hormone)
Anti-Müllerian hormone (AMH) is produced by granulosa cells in ovarian follicles and reflects the remaining pool of primordial follicles. Unlike FSH and estradiol, AMH does not fluctuate significantly across the menstrual cycle, making it the most reliable single marker of ovarian reserve.
AMH declines with age and becomes undetectable after menopause. It is widely used in fertility assessment and IVF planning. Low AMH does not mean infertility — it indicates a smaller remaining egg pool.
Source: ACOG, American Society for Reproductive Medicine.
What It Measures
Hormone reflecting the remaining pool of ovarian follicles (ovarian reserve).
Reference Ranges
| Status | Range (ng/mL) |
|---|---|
| Optimal | 1.0–3.5 ng/mL (reproductive age) |
| Normal | 0.5–1.0 ng/mL (low but not absent) |
| Borderline | 0.2–0.5 ng/mL (diminished reserve) |
| Out of Range | < 0.2 ng/mL (very low reserve) |
Range by Age
| Age Range | Typical Range |
|---|---|
| 20s | 1.5–4.0 ng/mL |
| 30s | 1.0–3.5 ng/mL |
| 40s | 0.5–2.5 ng/mL |
Source: American Society for Reproductive Medicine. AMH does not vary by cycle phase.
When to test: Any day — AMH does not vary by cycle phase.
Interpreting Your Results
When Values Are High
May indicate PCOS (many small follicles produce excess AMH). > 5 ng/mL highly suggestive of PCOS.
When Values Are Low
Diminished ovarian reserve. Does NOT mean infertility — indicates smaller remaining egg pool and may affect IVF response.
How GATOR Tracks This
Lab Providers
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
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