The AMH Test: What It Says About Your Egg Reserve, and What It Does Not

What does an AMH test measure?

AMH, short for anti-Müllerian hormone, is made by the small fluid-filled sacs in your ovaries called follicles. Each follicle holds one immature egg. The more of these small follicles you have, the more AMH they release into your blood. So an AMH test is a way of estimating how many eggs are left in your ovaries, which doctors call your ovarian reserve. It is a measure of quantity, and that is all it is.

What AMH cannot tell you matters just as much. It says nothing about whether your eggs are genetically healthy, which is the main reason fertility falls with age. It does not tell you whether your fallopian tubes are open, whether you ovulate each month, or whether your partner's sperm is normal. And for a woman who is not having IVF, it is a poor predictor of how quickly she will get pregnant naturally.

You were born with all the eggs you will ever have. Their number falls steadily from birth, and the fall speeds up in the late thirties. AMH tracks that decline, which is why the same result can be reassuring at 42 and worth a conversation at 28.

This is also why the test causes so much unnecessary fear. A woman in her early thirties is told by a private lab that her reserve is low, hears the word infertile in her head, and goes home convinced she has run out of time. In most cases that conclusion is wrong. The rest of this guide explains how to read the number properly, when the test is worth having, and when it is better left alone.

Does a low AMH mean you cannot get pregnant naturally?

No. The best evidence on this question comes from a study published in JAMA in 2017. Researchers in North Carolina followed 750 women aged 30 to 44 who had no history of infertility and had only just started trying to conceive. They measured AMH at the start and then simply recorded who became pregnant, and how quickly.

Women with a low AMH, below 0.7 ng/mL, had a 65% chance of conceiving within six cycles, compared with 62% for women with a normal AMH. By twelve cycles the figures were 84% and 75%. The difference was not statistically significant, which means a low AMH did not predict lower fertility. The authors concluded that AMH should not be used to assess natural fertility in women like these.

The reason is simple once you see it. Natural conception needs only one good egg each month, and a woman with a low reserve usually still releases an egg every cycle. What decides whether that egg can become a healthy pregnancy is mainly its quality, and egg quality is governed by age, not by AMH. A 32-year-old with a low AMH generally has better odds than a 42-year-old with a high one.

A low result does carry one real implication. It may suggest that your fertile years could end somewhat earlier than average, and that menopause may come earlier too. That is useful information for planning, not a verdict on whether you can conceive now.

What is a normal AMH level for your age?

There is no single normal AMH level, because AMH is supposed to fall as you get older. A result has to be compared with women of the same age, ideally measured on the same type of machine. Most published age tables come from European, American or East Asian women, so data from the region matter.

The largest data set for Arab women comes from a 2021 study of 2,495 women native to the Arabian Peninsula, all seen at fertility centres in Abu Dhabi and Dubai. Median AMH was 3.70 ng/mL in women aged 25 or younger and fell to 1.35 ng/mL between 36 and 40. Up to age 36 the median dropped by roughly 0.1 ng/mL a year, and between 36 and 40 the decline accelerated to about 0.23 ng/mL a year.

In Egypt, a team at Alexandria University measured AMH in 841 healthy women aged 16 to 49 and built the first age chart for Egyptian women, confirming the same strong fall with age. Keep in mind that the Gulf figures come from women attending fertility clinics, so they may sit slightly lower than in the general population. Use the table as a rough guide, not a pass or fail line.

Notice also how wide the spread is. Within any age group, some women have three or four times the AMH of others and conceive just as easily. A median is the middle of the crowd, not a target you have to reach.

How to read a low, normal or high AMH result

Labs and clinics use different cut-offs, but the Gulf study above grouped results in a way many fertility clinics in the region will recognise: below 1.3 ng/mL as low, 1.3 to 6.24 ng/mL as the usual range, and 6.25 ng/mL or above as high. Your report may print a different range, and the range printed on your own report is the one to use.

In that study, 40.6% of all the women had an AMH below 1.3 ng/mL. Among those aged 25 or under only 8.7% were low, but between 41 and 45 the figure was 69.3%. In other words, a low result at 42 is what most women of that age have. It is the age, more than the number, that tells the story.

A low result in a young woman is more worth discussing, especially if your periods are becoming shorter or irregular, if you have had surgery on an ovary, or if your mother had an early menopause. A very low or undetectable level in a woman under 40 whose periods have stopped raises the possibility of premature ovarian insufficiency. That needs a doctor and further tests such as FSH, not a guess.

A high result is usually not dangerous. It most often reflects a large number of small follicles, which is typical of PCOS. Before IVF, a high AMH tells the doctor that your ovaries may respond strongly to stimulation drugs, so the dose can be adjusted to lower the risk of overstimulation.

ng/mL or pmol/L: why your AMH number might look strange

AMH is reported in two different units, and this alone causes a lot of panic. Labs in the Gulf, Egypt and much of the Levant often use ng/mL, while labs that follow British or European practice use pmol/L. The same blood sample gives a number about seven times larger in pmol/L, so a result of 2 ng/mL is about 14 pmol/L.

To convert, multiply a result in ng/mL by 7.14 to get pmol/L, or divide a result in pmol/L by 7.14 to get ng/mL. If a cousin in London tells you her AMH is 15 and yours is 2, the two of you may in fact have almost identical results.

Different machines also give slightly different readings even in the same unit. The automated analysers used in larger labs read differently from some older manual kits that smaller private labs still use. If you want to follow a result over time, repeat it at the same lab, so that you are measuring a change in you and not a change in the method.

AMH does not need fasting and can usually be taken on any day of the cycle, unlike FSH, which is best measured on days 2 to 5. The pill and other hormonal contraception can lower AMH somewhat while you are using them, so tell the doctor if you are. Smoking is linked to faster loss of ovarian reserve.

Low AMH: what to do next

If you are under 35 and have been trying for less than a year, a low AMH on its own does not change much. The usual advice still applies: try for 12 months before fertility tests, or 6 months if you are 35 or older. Regular periods are a good sign that you are ovulating, whatever the AMH says.

If you are already having trouble conceiving, a low AMH helps the fertility doctor plan. It suggests that waiting a long time before treatment may not be wise, and it predicts that IVF may collect fewer eggs per cycle. It does not mean treatment will fail, and many women with a low AMH have healthy babies, with or without treatment.

Be careful with clinics and online sellers who use a low AMH to sell expensive fixes. In the region you will find ovarian rejuvenation injections with platelet-rich plasma (PRP), imported supplements promising to raise AMH, and herbal mixtures sold by herbalists as ovary boosters. None of these has good evidence that it increases the number of eggs or the chance of a baby. Ask what published evidence exists before you pay.

If you are not yet married, or not ready for children, a low AMH can be the prompt for an honest conversation with your doctor about timing and, where it is available and permitted, about egg freezing. Laws and religious rulings on egg freezing for unmarried women differ between Arab countries, so ask a licensed fertility centre what applies where you live.

High AMH and polycystic ovary syndrome

Women with PCOS often have many small follicles in each ovary, and because each follicle makes AMH, their levels are often well above average for their age. This is why the 2023 International Evidence-based Guideline for PCOS now allows AMH to be used instead of an ovarian ultrasound as one of the diagnostic criteria, in adults only.

That does not mean a high AMH equals PCOS. The diagnosis still needs at least two of three features: irregular or absent ovulation, signs of raised male hormones such as acne or excess hair, and polycystic ovaries on a scan or a high AMH. Other causes of irregular periods, including thyroid disease and high prolactin, have to be ruled out first. In teenagers AMH is not used for diagnosis, because levels are naturally high at that age.

A 2019 study at King Abdulaziz University in Jeddah compared 79 women with PCOS and 69 women with regular cycles. An AMH above 3.19 ng/mL identified PCOS with 72% sensitivity and 70% specificity. In practice that means roughly three in ten women with PCOS would have been missed by AMH alone, and roughly three in ten women without PCOS would have been wrongly flagged. It is a helpful piece of evidence, not a verdict.

If your AMH is high and your periods are irregular, our guide to PCOS explains the full picture, from blood sugar to fertility options. The encouraging part is that women with PCOS usually have plenty of eggs, and their main fertility challenge is ovulation, which is often treatable.

When is an AMH test genuinely useful?

The test earns its place in a handful of situations. Before IVF, it helps the doctor choose the dose of stimulation drugs and estimate how many eggs to expect. Before chemotherapy or pelvic radiotherapy, it gives a baseline so that freezing eggs or embryos can be discussed before treatment starts. Before surgery on the ovaries, such as removing endometriosis cysts, it helps weigh the risk of losing reserve.

The effect of cancer treatment is real. A study from Baghdad, published in the Saudi Medical Journal in 2018, followed women aged 25 to 45 newly diagnosed with breast cancer. Their AMH fell significantly after four cycles of anthracycline chemotherapy. If you or a relative are facing cancer treatment and still hope to have children, ask about fertility preservation before the first dose, not after.

AMH is also reasonable as part of a planning conversation if you intend to delay pregnancy and want a rough sense of your timeline, or if your mother or sisters went through an early menopause. It is not useful as a routine check in a young woman with regular periods who is not trying to conceive. It should never be used as a premarital test to judge whether a bride can have children, as some families request.

Whatever the reason, ask for the result to be interpreted by a gynaecologist or fertility specialist alongside an ultrasound count of follicles, called the antral follicle count, and your age. Do not let a single number on a lab printout make a life decision for you.

Sources

• Steiner AZ, Pritchard D, Stanczyk FZ et al: Association Between Biomarkers of Ovarian Reserve and Infertility Among Older Women of Reproductive Age, JAMA, 2017
• Melado L, Vitorino R, Coughlan C et al: Ethnic and Sociocultural Differences in Ovarian Reserve: Age-Specific Anti-Müllerian Hormone Values and Antral Follicle Count for Women of the Arabian Peninsula, Frontiers in endocrinology, 2021
• El-Attar EA, Hosny TA, Ichihara K et al: Nomogram of age-specific anti-Müllerian hormone levels in healthy Egyptian females, PloS one, 2021
• Ahmed N, Batarfi AA, Bajouh OS et al: Serum Anti-Müllerian Hormone in the Diagnosis of Polycystic Ovary Syndrome in Association with Clinical Symptoms, Diagnostics (Basel, Switzerland), 2019
• Teede HJ, Tay CT, Laven JJE et al: Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome, The Journal of clinical endocrinology and metabolism, 2023
• Al-Rawi SA, Saleh BO, Al-Naqqash MA et al: Serum anti-müllerian hormone levels in evaluation of chemotherapy effect on ovarian reserve in women with breast cancer. A follow-up study, Saudi medical journal, 2018