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Gyna

Getting pregnant and testing

What are realistic fertility chances at 40?

The short answer

Pregnancy is possible at 40, but age makes the average chance lower. A population percentage isn't your personal chance or a live-birth forecast. At 40, discuss evaluation after six months of trying, or sooner with known problems. Over 40, the American College of Obstetricians and Gynecologists (ACOG) recommends discussing evaluation now.

Evidence limits shown Sources are linked. Not yet reviewed by a clinician.

How we check answers

What can I do with this?

Use age to decide when to open a clinical conversation, not to calculate your own chance. At 40, discuss evaluation after six months of trying or sooner if you already know of a problem.

If you're over 40, discuss evaluation now.

But does this apply to me?

This answer is for someone around 40 deciding when to seek evaluation. It doesn't supply a personal chance, choose treatment or convert pregnancy per cycle into live birth per treatment cycle or embryo transfer.

Care and safety

When should I bring in a clinician?

Ask which population, outcome, egg source and treatment stage any quoted number describes. A normal ovarian-reserve test doesn't cancel age-related risk, and a low result alone doesn't tell you pregnancy is impossible.

Understand the answer

So what does this mean for me?

What does the research actually say?

ACOG's patient guidance describes less than 10% pregnancy per menstrual cycle by age 40. The American Society for Reproductive Medicine's (ASRM) older, 2012 booklet gives less than 5%.

These are broad authority summaries, not original cohort analyses read for this page. We don't average them or turn them into a personal forecast.

How does this compare with the official guidance?

The authority guidance is consistent about acting sooner as age rises, even though its broad pregnancy-per-cycle summaries differ. ACOG recommends discussing evaluation now when someone is over 40.

At 40, the guidance uses six months of trying, with earlier assessment for known problems.

Why is this our answer?

Four sources sit behind this answer: three professional guidance pages and one review abstract about ovarian-reserve testing. The percentages are broad authority summaries, not an individual prognosis.

Sources for each main claim

What else are you wondering?

Explore all getting pregnant and testing questions

Check the evidence

How sure can I be?

See the full evidence snapshot and sources

Evidence snapshot

The same fields appear on every Gyna answer, including when the research did not report something reliably.

Question and decision
What are realistic fertility chances at 40? Explain broad population estimates and when to seek evaluation without presenting a personal prognosis.
Who was studied
People around age 40 considering natural conception and the timing of fertility evaluation.
What was compared
Not applicable to this question.
Outcome measured, and over what period
Pregnancy per menstrual cycle in broad authority summaries. This is not live birth per treatment cycle, per embryo transfer or an individual forecast.
Kinds of evidence included
Three professional guidance pages and one research-review abstract.
Studies and participants
Not reliably reported in the evidence.
What the evidence shows
ACOG describes less than 10% pregnancy per cycle by 40; ASRM's older booklet gives less than 5%. The estimates are not averaged.
Consistency and disagreement
The two broad estimates differ. The guidance is consistent that evaluation should be discussed sooner with age or known problems.
Confidence in this answer
Population estimates cannot supply an individual prognosis.
Strength of the sources
The headline numbers are authority summaries rather than original cohort analyses read for this page; the ovarian-reserve evidence is an abstract-level review.
Review status
Sources are linked. Not yet reviewed by a clinician.
Who this does and does not describe
Broad age-based guidance, not a personal chance or a result that applies unchanged across outcomes, egg sources and treatment stages.
Harms, trade-offs and when to seek care
Avoid false precision, false reassurance from a normal ovarian-reserve test and delayed evaluation.
Last searched, and the records behind this
Last evidence search 2026-09-07. The source links are listed below.

Sources

Open the original guidance or study rather than taking our summary on trust.

  1. Evaluating Infertility (FAQ136)

    ACOG · Published April 2020; Last reviewed May 2026

  2. Age and Fertility (patient education booklet)

    ASRM / ReproductiveFacts.org · Created 2012 (no update date listed)

  3. Optimizing natural fertility: a committee opinion (2022)

    ASRM · 2022 (Fertil Steril 2022;117:53-63; replaces 2013 version)

  4. The physiology and clinical utility of anti-Mullerian hormone in women

    Human Reproduction Update · 2014

How we looked, and what we found

We searched the listed sources through September 7, 2026. We kept the two authority percentages separate because they differ and do not describe an individual's live-birth chance.

The ovarian-reserve review is used only for the testing boundary.

Who wrote this, and when will we revisit it?

Written by Gyna's evidence team from the sources listed on this page. The last evidence search was September 7, 2026.

Recheck this answer when the cited age or fertility-evaluation guidance changes.

Last updated
2026-09-09

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