What is AMH Test?
💡 AMH test = blood test measuring ovarian reserve. Can be done any day of cycle. Normal (25–35yr): 1.0–3.5 ng/mL. Low (<1.0 ng/mL): reduced reserve — fewer eggs, poorer IVF response. Very low (<0.5 ng/mL): severely diminished reserve. High (>3.5 ng/mL): may indicate PCOS; OHSS risk in IVF. Best combined with AFC (antral follicle count) on TVS.
The AMH test (anti-Müllerian hormone test) is a blood test that measures AMH — a hormone produced by small antral follicles in the ovaries. It is the single most reliable marker of ovarian reserve (the quantity of eggs remaining). Unlike FSH, AMH can be measured on any day of the cycle and does not fluctuate significantly between cycles, making it the preferred first-line ovarian reserve test in all fertility evaluations.
🇮🇳 India Context: AMH Test is widely assessed and treated across major Indian fertility centres including Chennai, Mumbai, Bangalore, Delhi, and Hyderabad.
What are the key characteristics of AMH Test?
- AMH is produced by granulosa cells of preantral and small antral follicles (2–9mm); directly reflects the size of the remaining primordial follicle pool
- Normal ranges (approximate): Age 25–35: 1.0–3.5 ng/mL. Age 35–40: 0.5–2.0 ng/mL. Age 40+: <1.0 ng/mL typical. Severely diminished: <0.5 ng/mL at any age
- Timing advantage: can be measured on any cycle day — does not require Day 3 timing like FSH; can be tested while on OCP (slightly suppressed but interpretable)
- IVF response prediction: AMH <0.5 ng/mL = poor responder (≤3 eggs expected); AMH 1–3 ng/mL = normal response (8–15 eggs); AMH >3.5 ng/mL = high responder (OHSS risk)
- AMH vs FSH: AMH detects reserve decline years before FSH rises; AMH is a better predictor of egg quantity; FSH reflects pituitary compensation; use both together for full picture
- High AMH (>5 ng/mL): often indicates PCOS (multiple small follicles); high OHSS risk in IVF; requires careful gonadotropin dosing
- AMH does NOT predict egg quality — a low AMH means fewer eggs, not necessarily poor-quality eggs; pregnancy is still possible with low AMH
- Serial AMH: declining AMH over 1–2 years in a young woman signals accelerating reserve loss — an indication to consider earlier IVF or egg freezing
How does AMH Test work?
Why does AMH Test matter in fertility?
The AMH test is the most impactful single test in the fertility workup — it determines whether a couple has time to try conservative treatments (normal AMH) or needs to move urgently to IVF or consider egg freezing before further reserve decline (low AMH). The critical communication point: low AMH predicts poor quantity but not zero chance of pregnancy — women with AMH 0.3–0.8 ng/mL do conceive naturally and with IVF. The test should be used to inform urgency and treatment planning, not to discourage patients from attempting conception.
What are related terms to AMH Test?
Low Ovarian Reserve (Diminished Ovarian Reserve)
Low Ovarian Reserve means a woman has fewer eggs than expected for her age. It i…
IVF (In Vitro Fertilisation)
IVF (In Vitro Fertilisation) is an assisted reproductive technology (ART) in whi…
Antral Follicle Count (AFC)
Antral Follicle Count (AFC) is a transvaginal ultrasound test. It is done early …
FSH (Follicle-Stimulating Hormone)
FSH (Follicle-Stimulating Hormone) is produced by the pituitary gland. In women,…
FAQs about AMH Test
What is an AMH test and why is it done?
An AMH (anti-Müllerian hormone) test is a blood test that measures ovarian reserve — the quantity of eggs remaining in the ovaries. AMH is produced by the granulosa cells of small antral follicles and is the most accurate single marker of egg supply. It is ordered as part of any fertility workup, before starting IVF (to personalise stimulation dose), and for egg freezing counselling. Unlike FSH, AMH can be measured on any day of the cycle.
What is a normal AMH level for fertility?
Normal AMH ranges by age (approximate): Age 25–30: 2.0–4.0 ng/mL; Age 30–35: 1.5–3.5 ng/mL; Age 35–40: 1.0–2.5 ng/mL; Age 40+: 0.5–1.5 ng/mL. Low: <1.0 ng/mL at any age suggests reduced reserve. Very low: <0.5 ng/mL = severely diminished. High: >3.5–5.0 ng/mL may indicate PCOS. Important: interpret alongside age and AFC (antral follicle count); a 38-year-old with AMH 1.2 ng/mL has relatively good reserve for her age.
Can I get pregnant with a low AMH?
Yes — low AMH reduces the chances of pregnancy (fewer eggs retrievable per IVF cycle) but does not eliminate it. Women with AMH as low as 0.1–0.5 ng/mL do conceive naturally and via IVF. Low AMH means: fewer eggs retrieved per IVF cycle (2–5 vs 10–15), lower cumulative live birth rate over multiple cycles, and greater urgency to start treatment sooner. AMH predicts egg quantity, not egg quality — a 30-year-old with low AMH has fewer eggs but those eggs can still be high quality.
Can the AMH test be done at any time of the month?
Yes — this is one of AMH's key advantages over FSH. AMH is produced continuously by small resting follicles and does not rise and fall with the menstrual cycle (unlike FSH, E2, and LH which must be measured on Day 2–4). AMH can be measured on any cycle day, regardless of menstruation, and remains stable from cycle to cycle. Minor variations of ±10–15% between cycles are normal. The only caveat: women on the combined oral contraceptive pill have AMH suppressed by 20–30% during use; wait 1–2 months after stopping for an accurate baseline reading.
What does a high AMH mean for fertility?
High AMH (>3.5–5.0 ng/mL) indicates a large number of antral follicles — most commonly seen in PCOS (polycystic ovary syndrome), where multiple small follicles fail to develop a dominant follicle. High AMH means: potentially higher egg yield in IVF, significant OHSS (ovarian hyperstimulation syndrome) risk if not managed carefully, and (in PCOS) potential for anovulation requiring OI to achieve conception. High AMH does not guarantee high egg quality — it predicts quantity only. IVF protocols for high AMH use low-dose stimulation and GnRH agonist trigger to prevent OHSS.
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