Egg Freezing Calculator

Your probability depends heavily on your age when the eggs were frozen and the number of mature eggs stored. Younger age at freezing and a higher egg count significantly improve your chances. For example, a woman under 35 with 10 mature eggs has a considerably higher probability than a woman who froze eggs at 40 with the same count. Use the calculator above for a personalised estimate.

Most fertility specialists suggest aiming for 10–20 mature eggs to achieve a reasonable probability of at least one live birth, depending on your age. Younger women typically need fewer eggs to achieve the same odds as older women. The calculator shows you how changing the egg count affects your estimated probability.

Yes — age at egg freezing is one of the strongest predictors of success. Egg quality declines with age, meaning survival rates after thawing, fertilisation rates, and embryo development rates are all lower for eggs frozen at older ages. Eggs frozen before 35 generally yield the best outcomes.

Not all eggs retrieved in a cycle are mature (MII stage). Only mature eggs can be successfully frozen and fertilised. Typically 70–80% of retrieved eggs are mature. This calculator uses the number of mature eggs frozen, so use that figure rather than your total retrieval count.

After thawing, eggs go through several stages: survival of the thaw (typically ~80–90%), fertilisation via ICSI, embryo development to blastocyst stage, and finally transfer to the uterus. Each stage involves some attrition, which is why more frozen eggs generally translate to higher live birth probability.

That is a deeply personal decision. Egg freezing costs typically range from $10,000–$15,000 per cycle including medications, plus annual storage fees. Physically, the hormone stimulation process involves injections over 10–14 days and a minor surgical retrieval. For women who anticipate delaying childbearing or facing fertility-threatening medical treatment, the potential benefit can outweigh the cost. Speaking with a reproductive endocrinologist will give you the most personalised guidance.

This calculator uses a live-birth-from-frozen-oocyte model derived from published clinical data, including research by Doyle and colleagues and Cobo and colleagues, which together analysed thousands of warmed eggs. The model applies age-adjusted survival, fertilisation, blastulation, and implantation rates to estimate cumulative live birth probability across your frozen egg cohort.

No — this tool provides statistical estimates based on population-level data, not a guarantee for any individual. Individual outcomes depend on many additional factors including egg quality, sperm quality, uterine health, lab conditions, and clinical expertise. Always consult a board-certified reproductive endocrinologist for personalised advice.