AMH levels by age decline gradually: from a median around 3 to 4 micrograms per litre in women in their early twenties to under 1 around 45. The table below gives the average values per age group, based on international reference studies (PMID 22579227).
Then please do keep reading. With no other blood value is the fine print as important as with this one.
AMH table by age
The values below are indicative medians in micrograms per litre, rounded and shown as a range. Half of women sit above such a median, half below; the spread within every age group is wide and usually no cause for concern.
| Age | Indicative median (µg/l) | For context |
|---|---|---|
| 20 to 24 years | Roughly 3.0 to 4.5 | Reserve around the adult maximum |
| 25 to 29 years | Roughly 2.5 to 3.5 | Slow, normal decline |
| 30 to 34 years | Roughly 1.5 to 3.0 | Still over 10 percent of the endowment left (PMID 20111701) |
| 35 to 39 years | Roughly 1.0 to 2.0 | The decline speeds up |
| 40 to 44 years | Roughly 0.3 to 1.0 | Around 3 percent of the endowment |
| 45 years and up | Often below 0.5 | Run-up to menopause |
The broad population range our doctors work with in their reviews runs from about 1 to 13 micrograms per litre. The width of that range says it all: without your age next to it, an AMH number can't be interpreted.
How should you read this table?
As context, not as a grade. If your value sits below your age group's median, your reserve is smaller than average; it says no more than that. Research among 750 women aged 30 to 44 showed that women with low AMH conceived spontaneously just as often as women with normal values (PMID 29049585).
Take Eva, 31, with a result of 1.1 micrograms per litre. That's below her group's median, and yet it says nothing about her chances this month. What it does do: make the conversation about her timeline earlier and more concrete.
So what the table mainly does is place your result on the age curve. The interpretation belongs with your GP afterwards, together with your story. What AMH does and doesn't mean more broadly is in our overview of AMH and your egg reserve.
What lowers your AMH temporarily?
The main disruptor is hormonal contraception. During pill use, researchers consistently measure lower AMH values, and there is no calculation trick to correct for it: the only honest picture comes from stopping in consultation with your doctor and re-measuring after two to three months (PMID 32362164).
Comparing an on-the-pill result with the table above is comparing apples with oranges.
Smoking is additionally linked to persistently lower values and an earlier menopause. And with PCOS the reverse applies: the value then comes out two to three times higher than the table would suggest.
Mind the unit: µg/l or pmol/l
Laboratories report AMH in micrograms per litre (µg/l) or in picomoles per litre (pmol/l), and those numbers differ by a factor of 7. One microgram per litre equals roughly 7.14 picomoles per litre. A "14" in pmol/l is therefore about a "2" in µg/l: the same result, different unit.
So always check the unit on your report before holding it next to any table. It's the most common reading error with this value, and it takes one glance to avoid.
Our page on the biomarker AMH explains the measurement itself in more detail.
Low AMH for your age: now what?
A value clearly below your age group is above all a signal to take your planning seriously, certainly if having children is still on the shelf for later. It is not a diagnosis and not a prediction; it is a good reason for a conversation with your GP about your options and your timeline.
If you'd like a first read on your own result, enter it into our AMH level check; it places your number next to your age group instantly.
No result yet? An AMH test works on any cycle day; the practical side of the draw is covered in AMH testing. And how the reserve behind this number works is in our piece on egg cells and age.
My final tip comes from reader questions: save your result including the unit and the date. An AMH value only becomes truly informative once you can place it next to a new measurement a few years from now.
Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP or your gynaecologist.
References
- La Marca A, Spada E, Grisendi V, et al. Normal serum anti-Müllerian hormone levels in the general female population and the relationship with reproductive history. Eur J Obstet Gynecol Reprod Biol, 2012. PMID 22579227.
- Wallace WH, Kelsey TW. Human ovarian reserve from conception to the menopause. PLoS One, 2010. PMID 20111701.
- Steiner AZ, Pritchard D, Stanczyk FZ, et al. Association Between Biomarkers of Ovarian Reserve and Infertility Among Older Women of Reproductive Age. JAMA, 2017. PMID 29049585.
- Landersoe SK, Forman JL, Birch Petersen K, et al. Ovarian reserve markers and endocrine profile during oral contraception. Gynecol Endocrinol, 2020. PMID 32362164.
- Thuisarts.nl. Wij willen graag zwanger worden.
Autor
Lunarahealth
Dr. Naimi, lekarz wpisany do holenderskiego rejestru BIG, nadzoruje standardy medyczne naszych treści i ocen. Przeczytaj naszą politykę medyczną
