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An AMH test is a simple blood test that measures Anti-Müllerian Hormone, a marker of your ovarian reserve — roughly, the size of the egg supply you have left. It’s one of the most useful single tests for understanding your reproductive timeline, but it’s also one of the most misunderstood.
If you’ve just had a result back, or you’re deciding whether the test is worth doing, the most important thing to know up front is this: AMH tells you about how many eggs you have, not about egg quality, and it does not predict whether you can get pregnant naturally. That distinction changes how you should read your result, and we’ll come back to it throughout this guide.
Below, we explain what an AMH blood test measures, what normal levels look like by age, what low and high results actually mean, when and how to test, and how to arrange a private AMH test in the UK.
You can check your ovarian reserve with an AMH blood test through Swift Blood Tests — no GP referral needed.
Anti-Müllerian Hormone (AMH) is a protein produced by the granulosa cells that surround your small, growing ovarian follicles — the sacs in your ovaries that each contain an immature egg. Because these follicles are the pool your future eggs are drawn from, the amount of AMH in your blood gives a reasonable estimate of how large that pool currently is.
An AMH blood test measures the level of AMH circulating in your blood at that moment. That level correlates with your ovarian reserve — the number of eggs remaining. Higher AMH generally means a larger reserve; lower AMH generally means a smaller one.
A key practical advantage is that AMH stays relatively stable across the menstrual cycle, unlike hormones such as FSH, LH and oestradiol, which swing significantly depending on the day. That’s why an AMH test can usually be taken on any day of your cycle.
“Ovarian reserve” simply means the quantity of eggs you have left. Women are born with all the eggs they’ll ever have — around one to two million — and that number declines steadily with age through a natural process of loss and ovulation. Ovarian reserve broadly tracks age, but there’s wide variation: two women of the same age can have very different reserves.
Because reserve is about quantity, not quality, and because a single egg is all that’s needed to conceive in any given month, ovarian reserve is only one part of the fertility picture.
An AMH test is genuinely useful for:
This is where most confusion — and most anxiety — comes from. An AMH test cannot tell you:
Keeping these limits in mind is what stops a low result from being read as bad news it isn’t.
In the UK, AMH is usually reported in pmol/L. In the US it’s often reported in ng/mL. To convert: 1 ng/mL ≈ 7.14 pmol/L.
Because AMH declines with age, results should always be interpreted against your age, not against a single “normal” figure. The table below shows approximate ranges — but reference ranges vary by laboratory and assay, so use your own lab’s ranges and your clinician’s interpretation as the authority.
| Age (approx.) | Typical AMH (pmol/L) |
|---|---|
| 25 | ~15–35 |
| 30 | ~12–30 |
| 35 | ~7–20 |
| 40 | ~3–10 |
| 45 | under ~5 |
Approximate ranges for guidance only. Interpretation depends on your lab’s reference range, your age and your wider clinical picture.
A low AMH result suggests a diminished ovarian reserve — a smaller pool of eggs than expected. It’s understandable that this can feel alarming, so it’s worth being clear about what it does and doesn’t mean.
Low AMH does not mean you’re infertile, and it does not mean you can’t conceive naturally. What it can mean is that your reserve is on the smaller side for your age, that you may respond less strongly to IVF stimulation (fewer eggs collected), and — sometimes — that you have less time before fertility declines further. It’s information about the shape of your reserve, not a verdict on your chances.
A few points that come up again and again from people who’ve had unexpected low results:
These are exactly the kinds of worries people talk through in fertility communities — real users often describe wrestling with whether to get tested at all, and how to read an unexpected number. Community discussions are useful for seeing how others think it through, but anecdotes aren’t medical advice — pair any result with a proper clinical interpretation.
A high AMH result usually means a larger-than-average ovarian reserve for your age, which is often simply a good thing. It can also mean your ovaries are likely to respond strongly to IVF stimulation — which is helpful to know, because a very strong response carries a higher risk of ovarian hyperstimulation syndrome (OHSS) that a clinic will want to manage carefully.
High AMH is also associated with polycystic ovary syndrome (PCOS), because women with PCOS tend to have a large number of small follicles, each producing AMH. But an important caveat: high AMH on its own is not a diagnosis of PCOS. PCOS is diagnosed on a combination of factors (typically some mix of irregular cycles, signs of raised androgens, and polycystic ovaries on ultrasound). Plenty of women have high AMH and no PCOS, and AMH is best read as one supporting clue among several.
Here’s the honest summary the evidence supports:
So if you’re trying to conceive naturally, a normal or high AMH is reassuring about reserve but not a guarantee, and a low AMH is not a barrier if you’re ovulating. AMH is most powerful when it’s read alongside age, AFC and other hormones — not in isolation.
If IVF is on your radar, AMH is one of the most useful tests to have done early. It helps a fertility clinic:
What AMH doesn’t do is decide whether IVF is worth pursuing. A very low AMH should not, on its own, be used to refuse treatment — it changes expectations about egg numbers, not whether a healthy pregnancy is possible.
You might consider an AMH test if you are:
You don’t need to be actively trying to conceive to benefit — a baseline now gives you something to compare against later.
Yes. Because AMH is relatively stable across the cycle, it can usually be taken on any day. Some fertility clinics still prefer around day 2–3 for consistency with other hormone tests, but this isn’t required for AMH accuracy.
No. Fasting is not required for an AMH test. AMH isn’t meaningfully affected by food, time of day or short-term lifestyle factors.
It can. Hormonal contraception (the pill, patch, ring, hormonal coil or implant) can lower measured AMH — by roughly 20–30% in many people — so a result taken while on contraception may read lower than your true baseline. If you want your most representative result and you’re able to, testing after a break from hormonal contraception (some clinicians suggest a couple of months) gives a cleaner picture. If that’s not practical, that’s fine — just interpret the number knowing it may be an underestimate.
It’s a straightforward blood test, taken by venous blood draw (or, with some home kits, a finger-prick sample). No special preparation is needed.
AMH generally trends downward over time as reserve declines, and it’s more stable than cycle-dependent hormones. But results can still differ between tests — because of contraception, the lab or assay used, or normal biological variation — and people are sometimes surprised to see a level rise or fall between two tests. If a result seems out of step with your wider picture, it’s reasonable to confirm it rather than act on a single figure.
AMH is powerful, but it’s one instrument in a larger toolkit. A fuller ovarian-reserve and fertility assessment often includes:
If you’d like the broader hormone picture rather than AMH alone, a fuller female hormone or fertility panel is often the more useful next step — and AMH slots neatly into it.
AMH testing is not routinely offered on the NHS outside of a fertility referral. In practice, it’s usually only arranged once you’ve been referred into a fertility pathway or are being assessed for treatment such as IVF — which typically requires a period of trying to conceive first (often around 12 months, or 6 months if you’re 36 or over), and can involve a wait.
That’s precisely the gap private testing fills. Many people who simply want to understand their ovarian reserve — before trying, while deciding, or for peace of mind — can’t get AMH through their GP without a referral, so a private AMH test is often the most direct route. If you’d like to arrange one, you can book an AMH blood test with Swift Blood Tests without a GP referral. Private AMH testing in the UK typically ranges from around £50 to £150 depending on the provider and whether it’s a home kit or clinic draw — check the service page for current pricing and turnaround times.
What is an AMH test? A blood test that measures Anti-Müllerian Hormone to estimate your ovarian reserve — the size of your remaining egg supply.
What does an AMH blood test measure? The level of AMH in your blood, which correlates with the number of small growing follicles in your ovaries, and therefore your egg quantity.
What is a normal AMH level for my age? There’s no single normal figure — AMH declines with age, so it’s read against your age band (see the table above). UK labs report in pmol/L, and ranges vary by laboratory, so use your own lab’s reference range.
What does low AMH mean — and can I still get pregnant? Low AMH suggests a smaller ovarian reserve. It does not mean infertility, and it does not prevent natural conception. Many women with low AMH who are ovulating conceive naturally; NICE guidance is clear that AMH shouldn’t be used to predict natural pregnancy.
What does high AMH mean, and does it mean I have PCOS? High AMH usually means a larger reserve. It’s associated with PCOS but isn’t diagnostic on its own — PCOS is diagnosed on several factors together.
Does an AMH test measure egg quality? No. AMH measures egg quantity, not quality. Quality is influenced mainly by age.
Does AMH predict natural fertility? No. It predicts ovarian reserve and IVF response, not your chance of conceiving naturally.
Can AMH predict when I’ll reach menopause? It can indicate that reserve is declining, but it cannot reliably predict the exact timing of menopause for an individual.
When should I take an AMH test — can it be done any day of my cycle? Yes, it can be taken on any day, because AMH is stable across the cycle. Some clinics prefer day 2–3 for consistency, but it isn’t required.
Do I need to fast before an AMH test? No fasting is needed.
Does the contraceptive pill affect AMH results? Yes — hormonal contraception can lower measured AMH by roughly 20–30%, so results on it may underestimate your baseline.
Should I repeat my AMH test? If a result doesn’t match your wider clinical picture — your age, your cycles, your other hormones — it’s reasonable to confirm it, ideally alongside an AFC scan and other hormone tests.
How much does a private AMH test cost in the UK, and can I get one without a GP referral? Private AMH tests generally range from around £50–£150 depending on the provider. You don’t need a GP referral for a private test — see the Swift Blood Tests AMH page for current pricing and how to book.
An AMH test is a genuinely useful piece of information — a clear snapshot of your ovarian reserve that can help you plan pregnancy, egg freezing or fertility treatment with more confidence. Just remember what it is and isn’t: a measure of egg quantity, not quality; a marker of reserve, not a prediction of natural fertility or a menopause countdown. Read alongside your age and, where relevant, other tests, it helps you make informed decisions rather than anxious ones.
If you’re ready to check your ovarian reserve, you can book an AMH blood test with Swift Blood Tests — no GP referral needed, with results delivered quickly and clearly.
