You go for a routine fertility check. Your periods are regular, you feel fine, and nothing seems off. Then the blood test results come back, and your AMH is low. The doctor uses words like "diminished ovarian reserve", and suddenly, a test you did almost as a precaution has turned your understanding of your fertility upside down.
This is a situation many women are now finding themselves in, as fertility testing becomes more accessible and more people check their reproductive health before actively trying to conceive. This often leads to confusion and uncertainty. If everything else seems normal, what does low AMH but regular periods actually mean?
AMH stands for Anti-Müllerian Hormone. It is produced by small follicles in the ovaries and provides doctors with an estimate of how many eggs remain, a measure called ovarian reserve.
A higher AMH suggests more eggs are available. A lower AMH suggests the reserve is smaller than expected for your age. The test is a snapshot; it tells you about quantity, not quality. It does not tell you whether the eggs you have are chromosomally normal or capable of resulting in a healthy pregnancy.
AMH also does not measure ovulation. It does not tell you whether you are releasing an egg each cycle. It is purely a marker of how many eggs are in the ovarian pool at the time of the test.
This is where many women feel confused and uncertain. Regular periods often give the impression that all aspects of reproductive health are functioning normally.
Not quite. Regular periods mean the hormonal cycle is functioning, with FSH rising, an egg being selected and released, and the uterine lining shedding each month. The cycle is happening.
However, AMH measures the overall pool of resting follicles, not simply whether a single follicle is chosen each month. A woman can still ovulate regularly and have a complete menstrual cycle while having a smaller-than-average ovarian reserve. The monthly cycle does not require a large pool to function. Only one egg needs to be selected and released.
Think of it this way. A healthy menstrual cycle can occur with either 50 or 500 eggs in reserve. Each month, the body selects one egg from whatever remains. AMH tells you about the inventory in the warehouse, not the quality of what is shipped out.
So, regular periods with low AMH are not contradictory. It is entirely possible, and more common than most individuals realise, especially among women tested in their mid-to-late thirties.
No! This is a key point to understand.
Low AMH means fertility chances are lower than with a normal AMH, but lower does not mean zero.
Are you wondering, “Can I get pregnant with low AMH?” Women with low AMH conceive naturally every day. They go through IVF and have babies. They freeze eggs with fewer retrieved than average and still have successful transfers.
A 28-year-old with low AMH faces a very different situation than a 38-year-old with the same result. Here is why.
In a younger woman, a low AMH indicates a smaller-than-average reserve, but the eggs that are there are likely still of good quality. Eggs from younger women are less likely to have chromosomal abnormalities. So while there are fewer eggs, the ones available have a reasonable chance of being normal and capable of resulting in a healthy pregnancy.
In a woman in her late thirties, low AMH combined with the natural age-related decline in egg quality means both quantity and quality are reduced. The window of opportunity is shorter, and there is greater urgency to act.
This is why a low AMH result in your late twenties or early thirties is not a crisis, but it is a signal to stop delaying if you know you want children. The reserve does not improve; it only reduces over time.
Low AMH and natural pregnancy can coexist. Several studies have shown that in women who are actively trying to conceive, AMH level alone is not a reliable predictor of whether they will get pregnant within a year of trying.
AMH is a stronger predictor of ovarian response to fertility treatment stimulation than of natural conception. In natural conception, only one egg per cycle is needed. If that egg is released and of good quality, fertilisation can occur regardless of how many eggs are in reserve.
The factors that have a greater impact on natural conception include:
● Whether ovulation is happening regularly, as your periods suggest it is.
● Whether the fallopian tubes are clear and patent, allowing the egg and sperm to meet.
● Whether sperm quality and count are adequate.
● Your age and the quality of the eggs being released.
If all of these are in order, a low AMH does not necessarily prevent natural pregnancy. It does mean the window may be shorter than it would be with a higher reserve.
The answer depends on where you are in life and what your plans are.
If you are not trying to conceive yet: A low AMH result is a useful piece of information. It tells you that waiting is riskier for you than it might be for someone with a normal AMH. Egg freezing is not about assuming pregnancy will be difficult later. It is about preserving the quality of your eggs at the time of freezing, when both egg quality and quantity may be more favourable.
If you are actively trying to conceive: Do not wait the standard 12 months before seeking an evaluation. With low AMH, an earlier fertility review, typically after 6 months of trying, or sooner if you are over 35, gives you more time to make informed decisions.
If you are over 35 with low AMH: Have a proper fertility evaluation as soon as possible. This includes a full hormonal panel, an antral follicle count on ultrasound, a tubal assessment if not done previously, and a semen analysis for your partner. Be proactive in making decisions based on the findings.
AMH cannot be raised significantly by diet or supplements. Despite what you may read online, no supplement has been shown in strong clinical evidence to meaningfully increase AMH levels. DHEA and CoQ10 are sometimes discussed in fertility circles. While they do support egg quality, they do not increase the reserve itself. Consult your doctor before beginning any new supplements or treatments.
Low AMH with regular periods can be confusing, but it does not mean you are without options. Regular periods are a good sign that the menstrual cycle is functioning, but they do not always confirm that ovulation or fertility is unaffected. Low AMH tells you the reserve is smaller than average. These two things can coexist, and often do. Whether a natural pregnancy is possible depends on your age, other fertility factors, and the timeframe you have available for trying to conceive. If your AMH is low, the most useful thing you can do is get a full fertility review and make decisions based on the complete picture, not the AMH number alone.
