What is a normal AMH level?

AMH (anti-Müllerian hormone) reflects ovarian reserve and changes with age. Typical ranges (ng/mL): under 30: 1.5–5.0; 30–34: 1.5–4.0; 35–37: 1.0–2.5; 38–40: 0.6–2.0; over 40: under 1.5. Multiply by 7.14 to convert ng/mL to pmol/L (used in UK and most of Europe). 'Normal' is age-relative — a 28-year-old's AMH should be much higher than a 42-year-old's. Always interpret your number against your age cohort.

What does low AMH mean?

Low AMH (under 1.0 ng/mL or under 7 pmol/L) suggests diminished ovarian reserve — fewer eggs remaining than typical for your age. It does NOT mean you cannot conceive; many women with low AMH conceive naturally or with IVF. What low AMH does predict is reduced response to stimulation (fewer eggs retrieved per cycle), and a tighter timeline for fertility planning. Low AMH does not directly predict egg quality, which is more closely correlated with age.

What does high AMH mean?

High AMH (above 4.0 ng/mL or 28 pmol/L) suggests a large ovarian reserve. The most common cause is PCOS (polycystic ovary syndrome). Other causes are rare. High AMH usually predicts a large response to stimulation — often producing many eggs per cycle, which is favourable for cumulative IVF success but raises OHSS risk that requires careful protocol management.

Can my AMH change over time?

Yes — AMH declines naturally with age, typically about 5–10% per year. Larger drops can occur after ovarian surgery, chemotherapy, or radiation. AMH does fluctuate slightly cycle-to-cycle (within roughly 10–15%), but a single value is generally reliable. Birth control pills can lower AMH slightly during use (reverses on stopping). Vitamin D deficiency may modestly suppress AMH (improves with correction).

How does AMH compare to FSH and AFC for predicting IVF response?

AMH is the most reliable single marker of ovarian reserve and IVF response. FSH (drawn day 2–3 of cycle) is older and more variable — a single high FSH does not necessarily mean poor reserve. AFC (antral follicle count by ultrasound) is highly correlated with AMH and useful as confirmation, particularly when AMH and clinical picture do not match. Most fertility specialists now use AMH + AFC together; FSH is supplementary.

Should I retest my AMH if I do not like the result?

Sometimes — but with caveats. AMH varies cycle-to-cycle by about 10–15% and lab-to-lab by similar amounts. A single surprisingly low (or high) result is reasonable to verify. However, repeated retesting hoping for a different answer is a recipe for disappointment. If you retest and the second value confirms the first, accept the result and plan accordingly. If they differ significantly, a third test or AFC ultrasound may help reconcile.

Is low AMH a problem if I am not yet trying to conceive?

It is information worth acting on, even if you are not actively TTC. Low AMH for your age suggests a tighter biological timeline. Options to consider: egg freezing (most useful before AMH drops significantly), accelerated family planning if appropriate, evaluation by a reproductive endocrinologist to rule out treatable causes (vitamin D, thyroid, autoimmune). It is not a verdict — but it is a signal worth respecting.

AMH Levels by Age: 2026 Reference Guide and What Your Number Means

AMH is the single most useful number for predicting how your ovaries will respond to IVF stimulation — and one of the most misunderstood. This reference guide gives you the typical ranges by age, explains what low and high values mean, and helps you interpret your own number against the right comparison group.

The single most important thing to know about AMH: "normal" is age-relative. A 28-year-old's AMH should be much higher than a 42-year-old's. Looking up a generic reference range without anchoring to your age is the most common mistake.

What is a good AMH level for my age?

Typical ranges in ng/mL: under 30: 1.5–5.0; 30–34: 1.5–4.0; 35–37: 1.0–2.5; 38–40: 0.6–2.0; over 40: under 1.5. In pmol/L (multiply ng/mL by 7.14): under 30: 11–36; 30–34: 11–29; 35–37: 7–18; 38–40: 4–14; over 40: under 11. Your AMH should be interpreted against your specific age cohort — a value that's normal at 40 might be quite low at 28.

Does AMH predict pregnancy success?

Indirectly. AMH predicts how many eggs you will likely retrieve in a stimulation cycle — and more eggs gives more cumulative chances. AMH does not directly predict egg quality (age does that). A 38-year-old with AMH 3.0 may retrieve more eggs than a 30-year-old with AMH 1.5, but the 30-year-old's eggs are likely higher quality. Cumulative IVF success depends on both numbers.

What AMH Actually Measures

Anti-Müllerian Hormone (AMH) is produced by small antral and pre-antral follicles in the ovary. It is a marker of the quantity of remaining follicles, not their quality. AMH:

Reflects how many eggs are left, broadly
Predicts response to stimulation drugs in IVF
Is stable across the menstrual cycle (can be drawn any day)
Declines with age — typically 5–10% per year
Does not directly predict egg quality (age does)
Does not predict natural fertility well — many women with low AMH conceive naturally

AMH Ranges by Age

Age	Typical (ng/mL)	Typical (pmol/L)	Concerning if below
Under 30	1.5–5.0	11–36	1.0 ng/mL (7 pmol/L)
30–34	1.5–4.0	11–29	1.0 ng/mL (7 pmol/L)
35–37	1.0–2.5	7–18	0.7 ng/mL (5 pmol/L)
38–40	0.6–2.0	4–14	0.5 ng/mL (3.5 pmol/L)
Over 40	Under 1.5	Under 11	0.3 ng/mL (2 pmol/L)

These are general guidance ranges. Lab-specific reference ranges may vary slightly. PCOS patients often have AMH well above the "typical" range for their age (often 4–8+ ng/mL).

Units: ng/mL vs pmol/L

AMH is reported in two unit systems depending on country:

ng/mL: Used in the US and parts of Asia
pmol/L: Used in the UK, EU, Australia, and Canada
Conversion: ng/mL × 7.14 = pmol/L (so 1.0 ng/mL ≈ 7 pmol/L)

A common confusion

Patients moving between countries (or comparing notes online) sometimes panic at numbers like "AMH 21" without realising it is pmol/L (= ~3.0 ng/mL, perfectly normal). Always check units before drawing conclusions.

Your IVF journey, organised and free

IVFPath is built for IVF patients — track medications, appointments, lab results, and costs all in one place.

💊

Medication Reminders

Never miss a dose — log every injection and tablet

📅

Appointment Calendar

All your scans, retrievals and transfers in one view

💰

Cost Tracker

Track spending so nothing is a surprise

Start for free — no card needed

Free · No credit card · Works on any device

What Low AMH Means

Low AMH for your age (typically under 1.0 ng/mL or 7 pmol/L) suggests diminished ovarian reserve. Important nuances:

Low AMH does not mean infertile. Many women with low AMH conceive naturally — egg quality (driven mostly by age) matters more for natural conception
Low AMH does predict reduced IVF response. Fewer eggs per cycle, potentially needing multiple cycles
Low AMH does not directly predict egg quality. Age does
Low AMH does suggest a tighter biological timeline. Worth acting on if you have time-sensitive options (egg freezing, accelerated TTC)
Some causes are partially reversible: Vitamin D deficiency, severe stress, certain autoimmune conditions can modestly improve with treatment

What High AMH Means

High AMH (above 4.0 ng/mL or 28 pmol/L) usually means PCOS or PCO morphology. Implications:

Large response to stimulation — many eggs per cycle
Higher OHSS risk requiring careful protocol design
Cumulative IVF success rates are typically very good
Often paired with PCOS clinical features: irregular cycles, insulin resistance, androgen excess
Should prompt full PCOS workup if not already done

How AMH Changes Over Time

Natural age-related decline: ~5–10% per year on average; faster after 35
Cycle-to-cycle fluctuation: ~10–15% — small enough that single readings are usually reliable
Lab variation: Different assays produce slightly different numbers; consistency within a lab is more reliable than across labs
Birth control pills: Can lower AMH ~10–20% during use; reverses on stopping
Ovarian surgery: Cystectomy or wedge resection can drop AMH significantly
Chemotherapy or radiation: Can dramatically lower AMH
Smoking: Associated with lower AMH
Vitamin D deficiency: May modestly suppress AMH

AMH vs FSH vs AFC

Marker	When measured	Reliability
AMH	Any cycle day	High — primary reserve marker
FSH	Cycle day 2–3	Variable — single high reading not definitive
AFC (ultrasound)	Cycle day 2–5	High — confirms AMH; operator-dependent

Most fertility specialists in 2026 use AMH as the primary marker, AFC as confirmation, and FSH as supplementary. If AMH and AFC agree, the picture is reliable. If they disagree substantially, look for measurement issues (lab error, recent OCP use, very early or late follicular phase).

Want help interpreting your AMH number?

AMH interpretation depends on your age, cycle history, and other markers. Nestie's AI assistant can give you a plain-language read of what your specific number means and what questions to ask your reproductive endocrinologist.

Interpret your AMH with Nestie →

Frequently Asked Questions

References

Reference ranges drawn from ESHRE and ASRM guidelines on ovarian reserve assessment, and widely-used clinical thresholds in IVF practice. Specific numbers vary by lab assay — always interpret results against your specific lab's reference range and your clinical team's assessment.

AMH Levels by Age: A 2026 Reference Guide