AMH Test: Normal Range by Age, Ovarian Reserve and What Your Result Means
AMH is produced by the small growing follicles in the ovary, so its level reflects the size of the remaining egg pool. Normal for most reproductive-age women is 1.0–4.0 ng/mL. It can be tested on any day of the cycle. A low AMH means fewer eggs remain; a high AMH is characteristic of PCOS.
Hormones & Fertility Panels
1 Parameter
Serum (2 mL)
12 Hours
Preparation & Fasting Guidelines
Detailed Clinical Overview
AMH is secreted by the granulosa cells of small preantral and early antral follicles — the pool of follicles waiting in reserve. Because it comes from this resting pool rather than from the single dominant follicle, AMH does not fluctuate meaningfully through the menstrual cycle and can be measured on any day. That practical advantage, together with its earlier sensitivity, is why it has largely displaced day 3 FSH as the primary marker of ovarian reserve.
AMH correlates well with the number of eggs likely to be retrieved during IVF stimulation, which makes it genuinely useful for planning treatment protocols and setting expectations. What it does not do is measure egg quality, which is determined mainly by age. A 40-year-old with a good AMH still has 40-year-old eggs.
In PCOS the picture inverts. The large number of small antral follicles characteristic of the condition produces a high AMH, often above 5 ng/mL, and this has been proposed as a supporting diagnostic marker. It also flags a risk of over-response to ovarian stimulation, which changes IVF protocol decisions.
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Frequently Asked Questions
Q: What is a normal AMH level?
A: Roughly 2.0 to 6.8 ng/mL under 30, 1.5 to 4.0 between 30 and 34, 0.8 to 3.0 between 35 and 39, and 0.2 to 1.5 between 40 and 44. Below 1.0 ng/mL indicates reduced ovarian reserve at any age, and above 4 to 5 ng/mL suggests PCOS.
Q: Can AMH be tested on any day of the cycle?
A: Yes. AMH comes from the resting pool of small follicles rather than the dominant follicle, so it does not fluctuate meaningfully through the cycle. This is one of its main practical advantages over FSH, which must be measured on day 2 to 4.
Q: What does a low AMH mean?
A: A low AMH means fewer eggs remain in the ovarian reserve. It predicts fewer eggs retrieved during IVF stimulation and suggests that fertility planning should not be delayed. Importantly, it does not mean you cannot conceive naturally — many women with low AMH do so without any assistance.
Q: Does AMH predict egg quality?
A: No. AMH measures quantity, not quality. Egg quality is determined mainly by age, which is why a 40-year-old with a good AMH still has 40-year-old eggs and a live birth rate that reflects her age. Both numbers matter, and neither substitutes for the other.
Q: What does high AMH mean?
A: A high AMH above 4 to 5 ng/mL is characteristic of polycystic ovary syndrome, reflecting the many small antral follicles typical of the condition. It predicts a strong response to ovarian stimulation and a higher risk of ovarian hyperstimulation syndrome, which changes how an IVF cycle is planned.
Q: Does birth control affect AMH?
A: Yes, hormonal contraception lowers AMH by roughly 20 to 30%. Where the result will guide an important decision, testing off contraception gives a truer picture. If that is not practical, the result should be interpreted knowing it is likely an underestimate.
Q: Is AMH or FSH better for assessing ovarian reserve?
A: AMH is more sensitive and more reproducible. It falls earlier in the decline of ovarian reserve, is stable across the cycle so can be tested on any day, and correlates better with IVF egg yield. FSH rises only once reserve is already substantially reduced. Most assessments use both, with AMH carrying more weight.
Q: Should I have an AMH test before egg freezing?
A: Yes, it is standard practice. AMH, alongside age and antral follicle count, is what allows a realistic estimate of how many eggs are likely to be collected per cycle, and therefore how many cycles may be needed to bank a useful number. It is central to informed decision-making about the process.
Q: Can AMH improve or be increased?
A: No treatment or supplement has been shown to genuinely increase ovarian reserve. Values fluctuate somewhat between measurements and rise slightly after stopping hormonal contraception, but the underlying follicle pool only declines. Claims that supplements raise AMH should be treated with considerable scepticism.
Q: Should every woman have an AMH test?
A: No. AMH is valuable for women investigating infertility, planning IVF or egg freezing, or facing treatment that may damage the ovaries. As a general screening test in women not trying to conceive, a low result causes real anxiety without changing what is medically possible, and it is not recommended for that purpose.
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