If you've looked into egg freezing or started thinking about trying to conceive, you've probably heard AMH called the "egg timer" test. It's one of the most talked-about numbers in fertility right now, and new research shows just how fast its popularity is growing.
That's a good moment to get clear on what the number means. An AMH result can be a useful starting point for planning. It is not a prediction of whether you'll have a baby. Here's how to tell the difference.
What the new research found
A study published August 31, 2026 in the Australian and New Zealand Journal of Obstetrics and Gynaecology looked at general practice records for almost 1.4 million Australian women. According to Flinders University's release on the study:
AMH testing rose more than 13-fold between 2011 and 2021.
Women aged 30 to 34 saw the sharpest rise, almost 20-fold.
Nearly 1 in 5 women tested got a result classified as low.
About one-third of women who repeated the test after a low result later had a normal result.
The lead researcher put it plainly: a low AMH result does not mean a woman is infertile, and a normal result doesn't guarantee future fertility. The researchers also noted that age remains the most important factor affecting fertility. The study made headlines again in an ABC News report on October 14, 2026.
None of this means AMH isn't worth knowing. It means it's worth knowing what it's for.
What AMH actually measures
AMH (anti-Müllerian hormone) is one of the main measures of ovarian reserve, meaning it reflects the supply of eggs your ovaries have left. Think of it as a rough read on quantity, not on egg quality or your chances of pregnancy.
What an AMH result can tell you
How your ovaries may respond to stimulation
This is where AMH shines. The American Society for Reproductive Medicine (ASRM) says AMH's ability to predict how many eggs will be retrieved, and whether someone will respond poorly or excessively to fertility medication, has been well demonstrated in numerous studies. That makes it useful if you're weighing egg freezing or IVF.
A steady baseline you can track
Unlike some fertility hormones, AMH tends to stay relatively consistent within and between menstrual cycles, according to ASRM. One caveat: levels may be lower if you use hormonal birth control, so your result should be read with that in mind.
What an AMH result can't tell you
Whether you'll get pregnant naturally
An NIH-funded study in JAMA followed 750 women aged 30 to 44 who had been trying to conceive for three months or less. Women with low AMH had similar chances of conceiving as women with normal AMH: 65% vs. 62% after six cycles, and 82% vs. 75% after twelve. Neither difference was statistically significant. ASRM agrees that ovarian reserve markers are poor predictors of reproductive potential independent of age.
Whether IVF will work
Even in IVF, ASRM says AMH on its own is only weakly predictive of pregnancy at best. It predicts egg numbers far better than it predicts babies.
Exactly when your fertility will change
AMH doesn't come with a countdown. As one IVF researcher told ABC, fertility declines with age but doesn't "fall off a cliff" at 35.
What this means if you're thinking about egg freezing
Egg freezing is growing fast too. A Human Reproduction study published October 6, 2026 followed 20,209 women in Australia and New Zealand who froze eggs for non-medical reasons between 2009 and 2023:
The number freezing eggs each year rose from 55 in 2009 to 4,919 in 2023.
Most froze between ages 34 and 38.
Among women with at least 10 years of follow-up, 27.9% came back to use their eggs, after an average of 4.9 years.
Of women who thawed their eggs, 33.9% had a live birth, rising to 37.8% for eggs thawed in 2019 to 2021.
Age at freezing was linked to the chance of a live birth.
Your AMH level can help you and your doctor estimate how many eggs a retrieval might yield. Your age at freezing, your goals and your budget matter just as much.
How to use your AMH result well
Look at it with context. AMH means more alongside your age, cycle history and other hormones. Our Comprehensive Fertility Collection Kit ($170) measures AMH, FSH, LH, estradiol, progesterone, TSH and DHEA-S together. If you mainly want your AMH baseline, the AMH + Vitamin D Collection Kit ($139) is a focused option.
Bring it to your doctor. A result is a conversation starter for you and your doctor or a reproductive endocrinologist, not a verdict.
Don't panic over one low number. In the Australian study, about a third of repeat results after a low reading came back normal. Ask your doctor whether retesting makes sense.
Mention birth control. Hormonal contraception may lower AMH.
Don't let a normal result set your timeline either. It doesn't guarantee future fertility.
All Novalynn collection kits use a simple finger-prick blood collection card processed by CLIA-certified labs, with results 2 to 5 days after your sample is received. They may be HSA/FSA eligible and are not available in New York. Not sure which kit fits? Take our quiz.
FAQ
Does a low AMH level mean I can't get pregnant? No. Women with low AMH conceived naturally at similar rates to women with normal AMH in the JAMA study.
Does a normal AMH level guarantee I'll be fertile later? No. The Australian researchers note a normal result doesn't guarantee future fertility, and age remains the biggest factor.
What is AMH most useful for? Estimating how many eggs might be retrieved and how your ovaries might respond to stimulation, per ASRM. That's why it's a helpful input when planning egg freezing or IVF.
Do I need to collect on a specific cycle day? AMH itself is relatively stable across the cycle. Other hormones in a fertility panel, like FSH, are cycle-dependent, so our Comprehensive Fertility Collection Kit is collected on day 2 to 5 of your cycle. Always follow your kit's instructions.
Does birth control affect AMH? It can. ASRM says levels may be lower with hormonal contraceptives, so results should be interpreted with caution.
This article is for education only and is not medical advice. Our collection kits are a tool to use with your doctor and don't replace a visit with your healthcare provider.