A good AMH level for fertility depends on your age, because AMH naturally declines as women get older. For women under 35, a level above 1.5 ng/mL is generally considered normal and suggests a healthy ovarian reserve. For women ages 35 to 40, a level above 1.0 ng/mL is typically adequate. For women over 40, a level above 0.5 ng/mL is often seen as acceptable, though fertility rates are lower at this age regardless of AMH.
What Is AMH and Why Does It Matter for Fertility?
Anti-Müllerian hormone (AMH) is a protein produced by the small follicles in your ovaries. These follicles contain the eggs. The amount of AMH in your blood gives doctors an estimate of how many eggs you have left — your ovarian reserve. It does not measure egg quality, only quantity.
AMH testing is commonly used during fertility evaluations. A higher AMH generally means more eggs available for fertilization. A lower AMH suggests a reduced egg supply. This information helps predict how you might respond to fertility medications and how long you may have to conceive naturally. However, AMH alone does not determine your chances of getting pregnant.
What Is a Good AMH Level by Age?
AMH levels are highest in a woman’s early 20s and then gradually decline. By age 30, average AMH levels are around 3.0 ng/mL. By age 35, average levels drop to about 2.0 ng/mL. By age 40, average levels fall to around 1.0 ng/mL. After age 45, levels are often very low, frequently below 0.5 ng/mL.
These are general guidelines. Different labs use different reference ranges. What one lab calls “low” another may call “normal” for a given age. Doctors look at your AMH along with your age and antral follicle count (an ultrasound measure) to assess fertility potential.
| Age Range | Typical AMH Range (ng/mL) |
|---|---|
| Under 30 | 2.5 – 6.0 |
| 30–34 | 1.5 – 4.0 |
| 35–39 | 0.7 – 3.0 |
| 40–44 | 0.3 – 1.5 |
| Over 44 | Below 0.5 |
Important: These numbers are averages. Many women with AMH levels below average still conceive naturally. AMH is only one piece of the puzzle.
How Does AMH Decline With Age?
AMH decline is steady and predictable for most women. The steepest drop typically occurs after age 35. By age 40, most women have lost about 90% of their original ovarian reserve. This decline reflects the natural loss of eggs that happens every month through ovulation and follicle atresia.
Some women experience a faster decline due to genetics, medical treatments, or conditions like endometriosis. Others maintain relatively higher AMH levels into their late 30s. Testing AMH every 6 to 12 months can help track your personal rate of decline if you are concerned about fertility timing.
What If Your AMH Is Low? Options and Limitations
A low AMH for your age does not mean you cannot get pregnant. It means you may have fewer eggs remaining. For women trying to conceive, a low AMH suggests that waiting longer could reduce chances further. Many women with low AMH conceive naturally within a few months.
If you are pursuing fertility treatment, low AMH often means you may produce fewer eggs during an IVF cycle. This can lower the chance of success per cycle. Some clinics recommend using higher doses of stimulation medications or considering donor eggs if AMH is very low and age is advanced.
Important: No treatment has been proven to increase AMH levels or restore egg supply. Some supplements and lifestyle changes are marketed for ovarian health, but clinical evidence is limited. The most reliable option is to plan pregnancy earlier or use egg freezing when AMH is still adequate.
Can AMH Levels Be Improved?
No large human trials have confirmed that any supplement, diet, or medication can raise AMH levels. AMH reflects the number of remaining eggs, which is largely determined by genetics and age. You cannot grow new eggs.
Some small studies have looked at supplements like CoQ10, DHEA, or vitamin D. Results are mixed and inconclusive. One 2018 study suggested that CoQ10 might improve egg quality in women with low ovarian reserve, but it did not show a clear increase in AMH. Other research on DHEA found no consistent benefit for AMH levels. The evidence here is limited, and no supplement is currently recommended for raising AMH.
What you can do: maintain a healthy weight, avoid smoking, and manage stress. These steps support overall reproductive health but have not been shown to increase AMH specifically.
Other Factors That Affect Fertility More Than AMH
AMH gets a lot of attention, but it is not the most important fertility factor. Age is the strongest predictor of pregnancy success. Egg quality declines with age, and AMH does not measure egg quality. A woman with a high AMH at age 42 still faces low egg quality and higher risk of miscarriage.
Male fertility factors matter equally. Sperm count, motility, and DNA fragmentation affect conception rates. Tubal blockages, uterine abnormalities, and hormonal imbalances like thyroid disorders or PCOS also play major roles. A complete fertility evaluation should include both partners.
AMH is useful for predicting ovarian response to fertility medications. It is less useful for predicting whether you will conceive naturally within a year. Many women with low AMH become pregnant without medical help.
Frequently Asked Questions
Can I get pregnant with low AMH?
Yes, many women with low AMH conceive naturally. Low AMH means fewer eggs, but it does not mean no eggs, and it does not directly predict implantation or pregnancy.
What is a normal AMH level for age 40?
At age 40, typical AMH levels range from about 0.3 to 1.5 ng/mL. Levels above 1.0 ng/mL are considered good for this age.
Does AMH predict egg quality?
No. AMH measures egg quantity, not quality. Egg quality is primarily determined by age. A young woman with low AMH can still have high-quality eggs.
How accurate is AMH testing?
AMH testing is reliable for estimating ovarian reserve when interpreted with age. Results can vary slightly between labs and across menstrual cycles, but the variation is small.
