Fertility Medicine
What Is the Best Age to Freeze Your Eggs?
Published · Haute MD Editorial Team
Egg freezing is most successful when done before age 38, and it typically works best in the 20s to early 30s. That is according to the American Society for Reproductive Medicine (ASRM). Egg quality and quantity decline with age, so eggs frozen younger are more likely to lead to a baby later. Freezing improves the odds but does not guarantee a pregnancy.
Why age matters more than anything else
The age at which eggs are frozen, not the age at which they are used, drives success. Older eggs are more likely to have chromosomal abnormalities, and the number of eggs retrieved per cycle falls with age. ASRM estimates that each frozen egg has roughly a 2% to 12% chance of resulting in a baby, with younger eggs at the higher end.
How many eggs might you need?
ASRM's 2021 committee guidance on planned oocyte cryopreservation (Doyle et al.) identifies age 38 as the clearest dividing line. It cites modeling that the number of mature eggs needed for about a 70% chance of at least one live birth rises with age: roughly 14 to 15 in younger age bands, and around 26 for women in their late 30s. A 2025 study in Reproductive BioMedicine Online reported the highest cumulative live-birth rates (above 75%) in women under 35 who stored 15 to 20 or more mature eggs. Some people need more than one retrieval cycle to bank that many eggs, especially after 35.
A practical age guide
Under 35: Best odds per egg; fewer eggs typically needed. 35–37: Still favorable; may need more eggs or more than one cycle. 38 and older: Success per egg drops; ASRM notes freezing is most successful before 38. Discuss realistic expectations and alternatives such as embryo freezing. Over 40: Lower success per egg; individualized counseling is essential.
What the process involves
Testing of ovarian reserve (often AMH and an antral follicle count by ultrasound). About 10–14 days of hormone injections to stimulate multiple follicles. Egg retrieval under sedation. Freezing by vitrification (rapid freezing). For timing detail, see How long does IVF take?
What egg freezing can't promise
No number of frozen eggs guarantees a baby. Eggs still must survive thawing, be fertilized, develop into embryos and implant. Ovarian reserve tests predict how many eggs you may retrieve, not whether you will get pregnant.
Questions to ask a fertility specialist
What do my AMH and antral follicle count suggest about how many eggs I'd retrieve? How many mature eggs should I aim for at my age? Would embryo freezing make more sense for me? What are your lab's egg-survival rates after thawing?
Find a doctor
Browse fertility specialists on Haute MD, or read How to choose a fertility specialist in New York.
Sources
ASRM ReproductiveFacts, "Egg Freezing" fact sheet. ASRM Practice Committee, "Evidence-based outcomes after oocyte cryopreservation for donor oocyte in vitro fertilization and planned oocyte cryopreservation: a guideline," Fertility and Sterility 2021 (Doyle et al.). Reproductive BioMedicine Online (2025), cumulative live birth rates after planned oocyte cryopreservation by age and oocyte number.
Frequently Asked Questions
What is the best age to freeze eggs?
Freezing typically works best in the 20s to early 30s and is most successful before 38, per ASRM.
Is 35 too late to freeze eggs?
No. Success per egg is lower than in the early 30s, so you may need more eggs or more than one cycle.
How many eggs should I freeze?
Guidance suggests about 14–15 mature eggs for women in younger age bands, for roughly a 70% chance of one live birth, and more with age. Your doctor will individualize this.
What's the chance a frozen egg becomes a baby?
ASRM estimates about 2% to 12% per egg, depending largely on age at freezing.
Does freezing stop my biological clock?
It preserves the eggs at the age they were frozen. It doesn't change other age-related pregnancy risks.
Is egg freezing or embryo freezing better?
It depends on whether you have a partner or donor sperm, and on your goals. Ask a reproductive endocrinologist.
Featured Haute MD Physicians
Browse Haute MD physiciansGet Help Now
Speak with a Haute MD Fertility physician
Are you a Fertility physician?
Join Haute MD Network and have your profile featured alongside these answers.
Apply for the NetworkRelated Guides
Guide · FERTILITY MEDICINE
IVF Success Rates by Age: How to Read Clinic Numbers
IVF success falls with age, but clinic numbers aren't apples to apples. Learn to read SART and CDC data: per retrieval, per transfer, live birth.
Read GuideGuide · FERTILITY MEDICINE
How Long Does IVF Take From Start to Transfer?
Most IVF cycles take several weeks from suppression or priming through retrieval and transfer—plus optional freeze-all. See a plain-English timeline.
Read Guide