What does an AMH level mean, and what can't it tell you?
AMH is one of several numbers on a fertility lab report. How to read it depends on why it was drawn, and whether you can compare it depends on which lab ran it.
Arun Verma, co-founder of Triangle · 2026-10-17
This is not clinical evidence and not medical advice. It does not replace your care team. Discuss anything here with your clinician before you act on it.
What does an AMH level mean?
Your AMH level is a blood measure that helps estimate how many eggs are left in your ovaries, known as your ovarian reserve. AMH stands for anti-Müllerian hormone. Follicles, the small sacs in the ovaries that hold immature eggs, make it. In healthy women of childbearing age, a higher level goes with a larger supply of eggs and a lower level with a smaller one. Reserve falls with age, and AMH falls with it. What a result means depends on why the test was done. In infertility care it is mainly used alongside other tests, so a fair question for your doctor is what your number changes, if anything, about the plan.
What can an AMH level not tell you?
It does not tell you about egg quality, and it does not tell you whether you will get pregnant. Ovarian reserve is a count of eggs, and egg quality is a separate matter that the count does not measure, according to ASRM's committee opinion. MedlinePlus states the same limit for people in infertility treatment: the test shows the size of the reserve, not the health of the eggs. Age is the stronger signal, and ASRM's committee opinion calls it a much stronger predictor of reproductive success than ovarian reserve. ReproductiveFacts.org, ASRM's patient site, adds that no single test of ovarian reserve can definitively predict a woman's ability to get pregnant.
Does a low AMH mean you can't get pregnant?
A low AMH does not, on its own, rule out pregnancy. ASRM's committee opinion says evidence of diminished ovarian reserve does not necessarily equate with an inability to conceive. One NIH-funded study, reported in 2017, enrolled 750 women ages 30 to 44 with no history of infertility. They had been trying to conceive for three or fewer months. Conception did not differ significantly between women with low and normal AMH, NICHD reported: 65 percent versus 62 percent after six cycles, and 82 percent versus 75 percent after 12. That study excluded women with known fertility problems, so it does not describe most people in treatment. The sources also set limits. ReproductiveFacts.org says abnormal ovarian reserve test results suggest that fertility potential has declined, though they do not tell who will or who will not conceive. For women presumed to be fertile, ACOG says a single AMH level does not appear useful for predicting time to pregnancy. Based on the limited data available, ASRM's committee opinion says reserve tests appear to be no more useful than age alone for predicting unassisted pregnancy in women with infertility.
What does AMH tell your clinic during IVF?
It helps estimate how your ovaries may respond to stimulation, which is where its track record is strongest. ASRM's committee opinion says predicting the number of eggs retrieved, and a poor or excessive response, has been well demonstrated for AMH and antral follicle count. MedlinePlus lists the same use: anticipating how you may respond to fertility medicine. For whether an IVF cycle ends in a pregnancy or live birth, ASRM's committee opinion says AMH on its own is only weakly predictive at best. Age, sperm quality, embryo development and lab technique also play a significant role. The same opinion says extremely low AMH values may be used to counsel about suboptimal response and yield. It also says the data do not support using a low value to deter or refuse treatment. A fair question for your team is what they expect AMH to add beyond your age and history.
Does AMH change during your cycle?
Relatively little, according to ASRM's committee opinion. It says AMH stays relatively consistent within and between cycles in young, ovulating women and in women with infertility. AMH can also be drawn at any point in the cycle. FSH and estradiol are checked at the start of one, usually on cycle day 3 and sometimes from day 1 to 5. There is one qualifier on stability. The same opinion says AMH may be lower in women currently using hormonal contraceptives, and that results should be interpreted with caution in those patients.
How does AMH compare with FSH, estradiol and antral follicle count?
ASRM's committee opinion says AMH has largely replaced FSH and estradiol as the blood marker of ovarian reserve, though those two can still add information when AMH is very low. It describes AMH as more sensitive than FSH and says it tends to decline before FSH rises. It lists antral follicle count, a count of small follicles on an early-cycle vaginal ultrasound, as a reasonable alternative when done at an experienced center. The committee opinion adds that AMH and antral follicle count may be discordant up to 30 percent of the time, according to at least one study, which can complicate management. A fair question for your team is how they weigh them together.
Is there a normal AMH level?
There is no single normal number you can carry from one report to the next, because a "normal" level depends on the lab. Laboratory procedures and "normal" levels vary from lab to lab, and comparing results across laboratories can be difficult, according to ReproductiveFacts.org. The reference range printed on your own report is the one that applies to that result, MedlinePlus explains, and ranges found elsewhere can't be compared with it. Age is part of the picture too, but the spread is wide. Reserve falls as age rises, and ASRM's committee opinion says it still varies considerably among women of the same age.
How can you compare AMH results across rounds or clinics?
MedlinePlus says you can't compare test results from different labs, and that for trends over time it's important to try to use the same lab. For AMH from different rounds, a fair question is which lab ran each one. Different tests also use different units of measurement. You could ask for the original lab reports and see which lab ran each AMH, what unit it reports in, and what reference range is printed beside it. A fair question for your doctor is whether a change from one round to the next is large enough, on that lab's method, to matter.
Sources
- MedlinePlus: Anti-Müllerian Hormone Test: MedlinePlus says what the AMH test results mean depends on the reason the test was done.
- MedlinePlus: Anti-Müllerian Hormone Test: MedlinePlus says that in healthy females of childbearing age higher AMH levels mean the ovaries have a larger supply of eggs, and that as the number of eggs decreases with age, AMH levels decrease.
- MedlinePlus: Anti-Müllerian Hormone Test: MedlinePlus says AMH tests are mainly used with other tests to make decisions about treating female infertility.
- MedlinePlus: Anti-Müllerian Hormone Test: MedlinePlus says an AMH test can tell you the size of your ovarian reserve but can't tell you about the health of your eggs or predict whether you'll be able to get pregnant.
- MedlinePlus: Anti-Müllerian Hormone Test: MedlinePlus lists predicting how well you may respond to fertility medicine as a use of AMH testing in people having infertility treatment.
- NICHD: How is infertility diagnosed?: NICHD says the levels of FSH and AMH in the blood can help determine the quantity of a woman's remaining egg supply.
- NICHD: How is infertility diagnosed?: NICHD says AMH is produced only in ovarian follicles, so the level of AMH in the blood indicates the presence of growing follicles.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion defines ovarian reserve as the number of oocytes (eggs) remaining in the ovary, and says it is different from oocyte quality, which relates to the potential of a fertilized oocyte to result in a live-born infant.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says ovarian reserve testing tests only the quantity, not the quality, of the remaining oocyte pool.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion calls age a much stronger predictor of reproductive success than ovarian reserve.
- ReproductiveFacts.org (ASRM): Ovarian reserve (predicting fertility potential in women) patient fact sheet, revised 2023: ReproductiveFacts.org (ASRM) says no single test of ovarian reserve can definitively predict a woman's ability to get pregnant.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says evidence of diminished ovarian reserve does not necessarily equate with an inability to conceive.
- NICHD: Ovarian reserve tests fail to predict fertility, NIH-funded study suggests (news release, October 10, 2017): NICHD's release on an NIH-funded study of 750 women ages 30 to 44 with no history of infertility, who had been trying to conceive for three or fewer months, says conception did not differ significantly between women with low and normal AMH: 65 percent versus 62 percent after six cycles and 82 percent versus 75 percent after 12 cycles.
- NICHD: Ovarian reserve tests fail to predict fertility, NIH-funded study suggests (news release, October 10, 2017): NICHD's release says women were ineligible for the study if they had known fertility problems.
- ReproductiveFacts.org (ASRM): Ovarian reserve (predicting fertility potential in women) patient fact sheet, revised 2023: ReproductiveFacts.org (ASRM) says abnormal ovarian reserve test results suggest that fertility potential has declined but do not tell who will or who will not conceive.
- ACOG Committee Opinion No. 773: The Use of Antimüllerian Hormone in Women Not Seeking Fertility Care (April 2019): ACOG's committee opinion says a single AMH level taken at any point in a population of women with presumed fertility does not appear to be useful in predicting time to pregnancy.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says that, based on the limited data available, it appears ovarian reserve test results are no more useful than age alone in predicting unassisted pregnancy in women with infertility.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says the ability of AMH and antral follicle count to predict oocyte yield, and poor and excessive response to gonadotropin stimulation, in assisted reproduction has been well demonstrated.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion, in its section on whether ovarian reserve tests predict pregnancy and live birth after IVF, says AMH as an independent variable is only weakly predictive of pregnancy at best, and that variables such as female age, sperm quality, embryo development, stimulation protocols and procedural and laboratory techniques play a significant role.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says extremely low AMH values may be used to appropriately counsel women regarding suboptimal response and yield, and that data do not support the use of a low value to deter or refuse treatment.
- ReproductiveFacts.org (ASRM): Ovarian reserve (predicting fertility potential in women) patient fact sheet, revised 2023: ReproductiveFacts.org (ASRM) says AMH levels can be checked at any time during the menstrual cycle, and that FSH and estradiol are checked at the beginning of the cycle, usually on cycle day 3 but possibly from day 1 to 5.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says AMH concentrations remain relatively consistent within and between menstrual cycles in normal, young, ovulating women and in women with infertility.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says AMH levels may be decreased in women currently using hormonal contraceptives and should be interpreted with caution in those patients.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says AMH has largely replaced basal FSH and estradiol testing as a biomarker of ovarian reserve, is a more sensitive measure than FSH and tends to decline before FSH rises, and that basal FSH and estradiol may provide additional information in women with very low AMH levels.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion describes antral follicle count as the number of antral follicles in both ovaries seen on transvaginal ultrasound in the early follicular phase, and says that in an experienced center it is a reasonable alternative to AMH.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says AMH and antral follicle count may be discordant up to 30 percent of the time according to at least one study, and that discordant results may complicate management.
- ReproductiveFacts.org (ASRM): Ovarian reserve (predicting fertility potential in women) patient fact sheet, revised 2023: ReproductiveFacts.org (ASRM) says laboratory procedures and "normal" levels vary from lab to lab, and that it can be difficult to compare results from one laboratory to another.
- ASRM Practice Committee: Testing and interpreting measures of ovarian reserve: a committee opinion (2020): ASRM's committee opinion says ovarian reserve correlates inversely with age, but there is considerable variation in ovarian reserve among women of the same chronologic age.
- MedlinePlus: How to Understand Your Lab Results: MedlinePlus says labs often use different testing methods and therefore different reference ranges, that the range printed on your own lab report is the one to check, and that you can't compare your result to reference ranges found elsewhere.
- MedlinePlus: How to Understand Your Lab Results: MedlinePlus says you can't compare test results from different labs, and that if you're looking for trends in your results over time it's important to try to use the same lab.
- MedlinePlus: How to Understand Your Lab Results: MedlinePlus says different tests use different units of measurement.
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