For anyone considering IVF, one question matters more than any other: “What are my real chances?” The honest answer begins with age. Understanding how success rates change across the decades helps you set realistic expectations, choose the right strategy, and avoid both false hope and unnecessary despair. The figures below are drawn from large, reputable registries and reflect live births — the outcome that ultimately matters to prospective parents.

Age Is the Number-One Determinant of Success

According to statistics from the U.S. CDC, SART, and the UK’s HFEA , the live birth rate per IVF cycle declines markedly with age. The core reason is that the proportion of chromosomal abnormalities (aneuploidy) in eggs rises with age:

  • Under 35 : About 30%–40% live birth rate per cycle — the most hopeful group.
  • 35–37 : About 25%–30% , beginning a gentle decline.
  • 38–40 : About 15%–20% , with the drop accelerating noticeably.
  • 41–42 : About 7%–10% — consider starting soon and evaluating egg donation.
  • Over 42 : Usually below 5% — egg donation is often recommended to significantly improve the odds.

AMH Reflects Egg “Quantity,” Age Determines “Quality”

AMH reflects the quantity of your ovarian reserve, but it cannot replace age’s effect on egg “quality.” A younger woman with a low AMH often still has better egg quality than an older woman. Therefore, success must be judged by combining quantity and quality; relying on AMH alone can easily lead to misjudgment.

It is also worth noting that AMH can vary with the timing of the test and certain medical conditions, so a single reading should be interpreted alongside your age and ultrasound findings rather than in isolation.

Cumulative Success Rates Matter More

A single transfer may not succeed the first time, but the cumulative live birth rate across multiple transfers rises substantially. For example, women under 35 who undergo 2–3 blastocyst transfers can reach a cumulative live birth rate exceeding 60%–70% . So one setback is not the end — plan for the whole picture.

How to Improve Your Success Rate

  • Start early and don’t delay the age window, especially after 35.
  • Choose blastocyst culture and PGT-A screening (especially over 35) to select the best embryos.
  • Improve lifestyle : quit smoking and alcohol, control weight, keep a regular schedule, and take folic acid.
  • For those with repeated failure, investigate endometrial receptivity, immune, and coagulation factors and treat accordingly.

Choosing the Clinic and Protocol Is Equally Key

At the same age, different centers’ technical levels, embryo culture conditions, and transfer strategies produce different results. Choose a fertility center with stable blastocyst culture capability that can perform PGT-A and vitrification (flash freezing) , and pay attention to its published age-stratified live birth rates rather than a vague overall pregnancy rate.

When to Consider Egg Donation

When age exceeds 43 , the ovaries can no longer reliably produce usable eggs, or repeated PGT-A shows all embryos are aneuploid, using eggs from a young donor can raise the live birth rate to a level comparable to the donor’s age (often over 50% ). This is a practical path for older patients — there is no need to shy away from it.

Want to know your real success rate for your age group? The International Department of Luohu Hospital in Shenzhen offers a complete IVF cycle for about $4,500–6,000 , which is 60–70% lower than in the United States . Book a free assessment: /consultation/, or reach us on WhatsApp: https://wa.me/8618886468446