What are ovarian reserve and AMH?
Ovarian reserve is a concept that gives an idea of the number of eggs and the overall capacity of the ovaries. It is most often assessed with an AMH blood test and an antral follicle count (AFC) on ultrasound. Reserve declines with age and can affect the response to treatment. However, AMH is not a measure of egg quality or a guarantee of pregnancy: a low value does not mean "you can't get pregnant," and a high value does not mean "it will definitely happen." The results are interpreted by your doctor together with your age and other findings.
"Your AMH result came back at…" is a sentence that worries many women right away. Yet AMH and ovarian reserve are a topic that guides you when understood correctly and causes needless anxiety when misunderstood. How is reserve measured, and, just as important, what does it not show?
What does ovarian reserve mean?
Ovarian reserve is an estimate of the number of eggs remaining in the ovaries and overall reproductive capacity. A woman is born with all the eggs she will ever have, and this pool shrinks over time and with age. Reserve gives an idea, particularly in IVF, of how many eggs the ovaries may produce in response to treatment.
Reserve = an estimate of number. Egg quality, on the other hand, depends largely on age and is not measured directly by tests. That is why reserve alone does not tell you the chance of pregnancy.
How is it measured? (AMH, AFC)
Two main methods are used together:
- AMH (anti-Müllerian hormone): A blood test that gives an idea of egg numbers. It is relatively stable and can usually be measured regardless of the menstrual cycle.
- AFC (antral follicle count): Counting the small follicles in the ovaries on ultrasound; usually done in the first days of the period.
In some cases, additional hormones such as FSH are also checked. Your doctor decides which tests are needed and when.
How age matters
Age is the most decisive factor affecting reserve. Both the number and the quality of eggs decline with age, and this decline becomes more noticeable after 35. That is why:
- An evaluation is recommended after 1 year of trying under 35, and after 6 months at 35 or older,
- For those facing a medical reason that may affect future fertility, fertility preservation may be considered; in Türkiye, egg freezing is permitted only for medical indications defined in the regulations.
Common misconceptions
Low AMH ≠ "you can't get pregnant." A low value suggests a reduced number, but natural pregnancy may still be possible.
High AMH ≠ "it will definitely happen." A high value (for example, in PCOS) mainly points to a larger number of eggs; on its own it is no guarantee of success, and in IVF it may even call for caution regarding ovarian hyperstimulation.
AMH is not a fixed verdict on your fate; it is a compass for planning. Rather than fixating on a single number, it should be interpreted together with age and other findings.
What if the reserve is low?
A low reserve is not "the end of the road"; it means "timing matters." The approach is individual and may include:
- Not delaying evaluation and planning,
- Discussing the option of IVF early, when appropriate,
- Looking after general health (for example, quitting smoking matters for both reserve and pregnancy),
- Considering fertility preservation options when there is a medical indication (in Türkiye, egg freezing is permitted only for medical indications).
The best step is to discuss your own results with your doctor in light of your age and your goals. Reserve is a starting point; you map out the way forward together.
Frequently asked questions
My AMH came back low. Does that mean I can't get pregnant?
No. A low AMH can indicate a reduced number of eggs, but it does not mean pregnancy is impossible. AMH alone does not show egg quality or the chance of natural conception. The result is assessed together with your age and other findings, and your doctor will discuss realistic expectations with you.
If my AMH is high, will I definitely get pregnant?
No. A high AMH mainly points to a larger number of eggs and is high in some conditions (for example, PCOS). On its own it does not mean "pregnancy is certain," and in IVF it may call for caution regarding ovarian hyperstimulation. The assessment looks at the whole picture.
On which day of the menstrual cycle is the AMH test done?
AMH is a relatively stable hormone and can usually be measured on any day, regardless of the menstrual cycle. An antral follicle count (AFC) on ultrasound, however, is usually done in the first days of the period. Your doctor decides on the timing and which tests are needed.
Can I increase my ovarian reserve?
There is no proven method that permanently increases the number of eggs (the reserve); reserve naturally declines over time. General health and factors such as quitting smoking do matter, though. If the reserve is low, the focus is on timing and a plan that make the best use of the current situation.
Can IVF be done with a low ovarian reserve?
Yes, when appropriate. A low reserve does not rule out IVF, but it can affect the response and the expectations. The plan is tailored to you by looking at age, AMH, antral follicle count and history together. Talk this over with your doctor.
Sources
- ESHRE — Reproductive medicine guidelines
- ASRM — ReproductiveFacts (patient information)
- World Health Organization (WHO) — Infertility
Note: This content was written independently, based on current scientific information published by the institutions above; it is not a direct copy of any text.
This article is for general information only; it is not a diagnosis or treatment recommendation and does not replace a medical examination. Please consult your doctor about your own situation. The content reflects scientific knowledge as of the update date above.