Egg Freezing Success Rate Calculator
Estimate the probability of live birth after egg freezing based on your age and number of frozen oocytes. Free fertility success rate calculator with charts.
About This Calculator
The Egg Freezing Success Rate Calculator helps you estimate the probability of achieving a live birth after elective egg freezing (oocyte cryopreservation). Based on the research by Goldman et al. (2017) published in Fertility and Sterility, our calculator uses age-specific per-oocyte success rates to predict the likelihood of one, two, or three live births from a given number of frozen mature eggs.
The calculator is based on the formula P(≥1 live birth) = 1 − (1 − p)^n, where p is the age-specific probability of a live birth per frozen egg, and n is the number of eggs. The per-egg probability accounts for the rate of oocyte maturation to blastocyst (PB) and the euploidy rate (PE), both of which decline with advancing maternal age. Values are derived from clinical data on over 1,000 egg freezing cycles, providing evidence-based success estimates.
Understanding Your Results
Your results show the cumulative probability of achieving at least one, two, or three live births from the specified number of frozen eggs. The per-egg success rate represents the likelihood that any single frozen egg will lead to a live birth. Use the chart toggle to view either a summary of cumulative probabilities or a detailed distribution showing the probability of exactly 0, 1, 2, or more live births.
Regional Notes
India: Egg freezing for medical indications was legalized in India under the Assisted Reproductive Technology (ART) Act of 2021. Many clinics in major cities (Mumbai, Delhi, Bangalore) offer vitrification-based egg freezing. The cost typically ranges from ₹1-2 lakhs per cycle, with annual storage fees of ₹10,000-30,000.
United States: Elective egg freezing has grown significantly since ASRM removed the "experimental" label in 2012. Many employers offer fertility benefits covering egg freezing. The average cost is $10,000-15,000 per cycle plus $500-1,000/year for storage. Success rates vary significantly by clinic and patient age.
United Kingdom: Egg freezing is available on the NHS for medical reasons (e.g., cancer treatment), but elective freezing is typically self-funded. Private costs range from £3,000-5,000 per cycle with £200-400 annual storage fees. The HFEA regulates all fertility clinics and publishes clinic-specific success rates.
Frequently Asked Questions
How is the egg freezing success rate calculated?
The success rate is calculated using the formula P(≥1 live birth) = 1 - (1 - 0.6 × PE × PB)^n, where PE is the probability of a euploid blastocyst, PB is the probability of an oocyte maturing into a blastocyst, and n is the number of frozen eggs. The per-oocyte live birth probability is age-specific, derived from the research by Goldman et al.
What is the best age to freeze eggs?
The best age to freeze eggs is between 24 and 35 years old, when fertility is relatively stable and at its highest. Women under 35 have the highest per-oocyte success rates. After age 35, both the quantity and quality of eggs decline more rapidly, reducing the probability of a successful live birth from frozen eggs.
How many eggs should I freeze?
The number of eggs to freeze depends on your age and desired family size. For a woman aged 35 or younger, freezing 10-20 eggs typically yields a 60-84% chance of at least one live birth. For women aged 38-40, 15-30 eggs may be needed for a similar probability. Our calculator lets you adjust the egg count to find the right number for your goals.
Does egg freezing guarantee a future pregnancy?
No, egg freezing does not guarantee a future pregnancy. While it significantly improves the chances of conceiving later in life, success depends on multiple factors including the woman's age at freezing, egg quality, and the number of eggs frozen. Even with optimal conditions, the probability of a live birth from frozen eggs is never 100%.
What factors affect egg freezing success rates?
The primary factor is the woman's age at the time of egg freezing, as it determines both egg quality and the likelihood of chromosomal normality (euploidy). Other factors include the number of mature eggs frozen, the clinic's laboratory quality, the freezing technique (vitrification vs. slow freezing), and the woman's overall ovarian reserve.
How is the per-egg success probability determined?
The per-egg success probability combines two key rates from the research by Goldman et al.: the probability of an oocyte maturing into a blastocyst (PB) and the probability of that blastocyst being euploid (having the correct number of chromosomes, PE). Both rates decline with age. For example, at age 36, each frozen egg has approximately an 8.7% chance of leading to a live birth.
Can I use frozen eggs from egg freezing in IVF treatment?
Yes, frozen eggs from egg freezing are used in IVF (in vitro fertilization) treatment. When you are ready to conceive, the eggs are thawed, fertilized with sperm through ICSI (intracytoplasmic sperm injection), and the resulting embryos are transferred to the uterus. The survival rate of vitrified eggs after thawing is typically over 90% at experienced clinics.