AMH and Ovarian Reserve: What Your Levels Really Mean

AMH, or anti-Mullerian hormone, is a blood marker of how many eggs you have left, not how good those eggs are. It's made by the granulosa cells that surround your small, early-stage follicles, so the more of those follicles you have, the higher your AMH tends to be. In plain terms, AMH is a headcount of your remaining egg supply, what doctors call your ovarian reserve.

Here's the part that gets missed. AMH does not measure egg quality, and it is not a good standalone test of whether you can get pregnant naturally. The American Society for Reproductive Medicine puts it directly: markers of ovarian reserve are good predictors of how many eggs IVF will collect, but they're poor independent predictors of your actual chance of having a baby. A low number is information, not a verdict.

AMH and the antral follicle count (AFC) are the two tests fertility specialists trust most to predict how your ovaries will respond to IVF stimulation. The ESHRE guideline on ovarian stimulation recommends using either AFC or AMH over other ovarian reserve tests for predicting both high and poor responders. AFC is the number of small follicles your doctor counts on an ultrasound scan, so the blood test and the scan together give a fuller picture.

Based on these, you're usually sorted into one of three groups. A poor responder has low AMH and a low follicle count, and tends to yield fewer eggs per cycle. A normal responder sits in the middle. A high responder has plenty of follicles and is likely to produce many eggs, which is great for numbers but raises the risk of overstimulation. Your specialist uses this grouping to pick your drug type and dose, aiming for a safe, useful number of eggs rather than simply the most possible.

AMH naturally declines as you get older, because your store of follicles shrinks over time. That's expected biology, not a disease. The tricky part is that there's no single universal cutoff for normal, and what counts as low at 28 is different from what counts as low at 40. Indian data show the picture varies locally too. In a large study of more than 54,000 Indian women seeking infertility care, about 29% of those under 30 and nearly 49% of those aged 30 to 39 had an AMH of 2 ng/mL or below.

Assays add another wrinkle. Different laboratory platforms can return different AMH values for the same sample, and an international standard to harmonise them is still being worked out. So compare your result against your own lab's age-based ranges, and try to use the same lab if you're tracking AMH over time. One number in isolation, read against the wrong reference, can mislead.

No. A low AMH does not mean you cannot get pregnant naturally, and this is the most important thing to take from this guide. AMH predicts how many eggs IVF stimulation will collect. It does not predict your month-to-month chance of conceiving on your own.

The clearest evidence comes from a 2017 JAMA study of women aged 30 to 44 with no history of infertility. Women with low AMH (below 0.7 ng/mL) were no less likely to conceive than women with normal AMH. By six cycles of trying, the predicted chance of pregnancy was about 65% in the low-AMH group versus 62% in the normal group, and by twelve cycles it was roughly 84% versus 75%. The authors concluded that AMH should not be used to judge natural fertility. So if your AMH came back low, it's a reason to talk to a specialist about timing and options, not a reason to panic.

A high AMH usually points to a large pool of small follicles, and it's a common finding in polycystic ovary syndrome (PCOS). It isn't a problem in itself, and it often means a strong response to IVF drugs. But it does flag a real safety issue, the risk of ovarian hyperstimulation syndrome (OHSS), where the ovaries overreact to stimulation and can become swollen and painful.

This matters in PCOS. In one study of nearly 2,700 women with PCOS going through their first IVF or ICSI cycle, about 25% developed OHSS, with a high follicle count among the recognised risk factors. The good news is that this is largely manageable. Your team can lower the drug dose, use a GnRH antagonist protocol, and choose a freeze-all approach, which ESHRE recommends to fully remove the risk of late OHSS, freezing the embryos and transferring them in a later, calmer cycle. If you have PCOS, ask specifically how your clinic plans to keep you safe. Our PCOS guide goes deeper.

AMH testing makes the most sense when you're being assessed for fertility treatment or planning IVF, since its real strength is predicting egg yield. The ASRM advises against using ovarian reserve markers as a fertility test in women who aren't infertile or whose fertility is untested, because a number on its own can cause needless worry. A handy feature is that AMH is fairly stable across the menstrual cycle, so it can usually be drawn on any day, unlike day-2 or day-3 FSH.

When you get your result, ask a few grounded questions. What does this value mean for my age, using this lab's ranges? Are we combining it with an antral follicle count? How would it change my IVF protocol and dose? And does it affect my OHSS risk? You can pair this with our planning tools and read more about treatment paths in our IVF guide. The aim is a clear plan, not alarm over a single figure.