A “good” AMH level depends on your age, but as a general benchmark, anything between 1.0 and 3.5 ng/mL is considered normal for most women of reproductive age. AMH, or anti-Müllerian hormone, is produced by the small follicles in your ovaries and serves as a snapshot of your remaining egg supply. The number naturally declines as you get older, so what counts as good at 30 looks very different from what’s good at 40.
AMH Levels by Age
Your ovarian reserve peaks in your mid-20s and drops steadily from there. These estimates from the Cleveland Clinic represent the lower side of the expected spectrum at each age:
- Age 25: 3.0 ng/mL
- Age 30: 2.5 ng/mL
- Age 35: 1.5 ng/mL
- Age 40: 1.0 ng/mL
- Age 45: 0.5 ng/mL
If your result is at or above these numbers for your age, your ovarian reserve is likely in a healthy range. If you’re between ages on this list, you can roughly estimate where you’d fall. Keep in mind there’s wide natural variation. Two healthy 32-year-olds might have AMH levels of 1.8 and 4.5, and both could be perfectly normal.
What a Low AMH Actually Means
An AMH below 1.0 ng/mL is generally considered low, though context matters. Research frequently uses this threshold to define diminished ovarian reserve, particularly in fertility treatment settings. At levels below 0.7 ng/mL, some clinicians consider the reserve significantly reduced. Extremely low values, below 0.16 ng/mL, are associated with more challenging IVF outcomes: in a large national analysis, about half of cycles at that level were canceled, and the live birth rate was 9.5% per cycle started.
That said, the American Society for Reproductive Medicine is clear that low AMH alone should not be used to refuse or discourage treatment. It’s a piece of the puzzle, not the whole picture.
Low AMH and Natural Pregnancy
Here’s something that surprises many people: a low AMH doesn’t necessarily mean you can’t get pregnant on your own. AMH reflects the quantity of eggs remaining, not their quality. In a study of young women with infertility, those with low AMH (but not extremely low) had pregnancy rates very similar to women with normal AMH, around 41% compared to 44%. For women under 35, the cumulative live birth rate within 18 months was 37% in the low AMH group versus 42% in the normal group, a difference that wasn’t statistically significant.
The picture changes at very low levels. Women with very low AMH took roughly twice as long to conceive (about 13 months versus 7 months) and had noticeably lower cumulative live birth rates. So while moderately low AMH isn’t a fertility death sentence, very low levels do signal a meaningfully smaller window.
Why AMH Matters for IVF
Where AMH really proves its value is in predicting how your ovaries will respond to fertility medications during IVF. Higher AMH levels correlate strongly with more eggs retrieved. In a study of 320 women undergoing IVF, those with AMH above 1.1 ng/mL had a median of 6 eggs retrieved, while those at or below 1.1 ng/mL had a median of just 2. Each one-unit increase in AMH was associated with a 1.66-fold increase in the number of mature eggs collected.
This matters because more eggs generally means more embryos to choose from, which improves the odds of finding a healthy one. It doesn’t guarantee pregnancy, but it gives your fertility team more to work with. If you’re considering egg freezing, your AMH level helps estimate how many retrieval cycles you might need to bank a meaningful number of eggs.
When AMH Is Too High
While most people worry about low AMH, unusually high levels can also be significant. Very elevated AMH is one of the markers associated with polycystic ovary syndrome (PCOS), a condition where the ovaries contain many small follicles that each produce the hormone. Research on diagnostic thresholds found that an AMH above 8.16 ng/mL in women aged 20 to 29, or above 5.89 ng/mL in women aged 30 to 39, was a useful cutoff for identifying PCOS. If your AMH is well above the expected range for your age and you have irregular periods or other symptoms, it’s worth discussing PCOS with your provider.
Hormonal Birth Control Can Skew Results
If you had your AMH tested while on hormonal contraception, your result may be artificially low. A large cross-sectional study of over 27,000 women found that combined oral contraceptives, the vaginal ring, and the implant each suppressed AMH by roughly 22 to 24%. The progestin-only pill lowered levels by about 15%, and hormonal IUDs by about 7%. The good news is that the duration of use didn’t matter. Whether you’d been on the pill for one year or ten, the suppression was similar, and levels return to their true baseline after stopping.
If your AMH came back lower than expected and you were on birth control at the time, you may want to retest a few months after discontinuing.
Vitamin D and AMH
There’s growing evidence that vitamin D status influences AMH levels. Women with higher vitamin D concentrations tend to maintain their ovarian reserve longer, and supplementation in vitamin D-deficient women without PCOS has been shown to increase AMH. One study of infertile women with diminished ovarian reserve found that both AMH and follicle counts increased after vitamin D supplementation. Interestingly, the effect goes the opposite direction in women with PCOS, where vitamin D supplementation appeared to decrease their elevated AMH toward more normal levels.
This doesn’t mean vitamin D supplements will meaningfully change your fertility. But if you’re vitamin D deficient, correcting that deficiency may give you a more accurate AMH reading and potentially support ovarian function.
AMH as a Menopause Predictor
Beyond fertility, AMH can help estimate how far off menopause might be. In a study of women in their late reproductive years, those aged 45 to 48 with AMH below 0.20 ng/mL reached menopause in about 6 years on average. Women in the same age group with AMH above 1.50 ng/mL also reached menopause in roughly 6 years, but for younger women the differences were dramatic: a 35- to 39-year-old with AMH above 1.50 ng/mL had more than 13 years until menopause, while one with AMH below 0.20 ng/mL had about 10 years. Once AMH becomes undetectable, menopause typically arrives within about 6 years regardless of age.
Understanding Your Units
AMH results are reported in two different units depending on where you live. Most clinics in the United States use ng/mL, while many European and Australian labs report in pmol/L. To convert, multiply ng/mL by 7.18. So an AMH of 2.0 ng/mL equals about 14.4 pmol/L. If your results look unexpectedly high, check whether your lab used pmol/L before panicking or celebrating.