Home / Calculators / Egg and embryo freezing / How many eggs to freeze
Every calculator in one place, free and with no sign-up. Results show instantly — we don't hide them behind a form. Each one explains what the number means, where the reference ranges come from, and what it cannot tell you.
A calculator sees three or four figures. A specialist sees your history, your scans, your partner's results, and how you actually responded to treatment. If you're between cycles, changing clinics, or something in your results doesn't add up, a second opinion is the fastest way to find out whether anything would be done differently.
Free first consultation. No obligation to start treatment, and it doesn't affect your care at your current clinic.
These tools provide general information and are not a diagnosis or a substitute for assessment by a qualified clinician. Reference ranges and sources are stated on each calculator. Predictive estimates describe groups of people and cannot predict an individual outcome.
A calculator sees three or four figures. A specialist sees your history, your scans, your partner's results, and how you actually responded to treatment. If you're between cycles, changing clinics, or something in your results doesn't add up, a second opinion is the fastest way to find out whether anything would be done differently.
Free first consultation. No obligation to start treatment, and it doesn't affect your care at your current clinic.
Eggs typically needed for a realistic chance, by age.
Population estimateAn average for people with your inputs, not a prediction for you. Individual outcomes vary widely around it.
A 2024 systematic review of planned egg freezing found a live birth rate of 28% per patient overall, rising to 52% for women who froze at 35 or younger and falling to 19% for those who froze at 40 or over. Oocyte survival after thawing averaged 78.5%.
Source — Hirsch et al., Human Reproduction Update 2024 (systematic review and meta-regression): live birth 28% per patient overall; 52% (95% CI 41–63) if frozen at ≤35; 19% (95% CI 13–29) if frozen at ≥40; oocyte survival 78.5% (95% CI 74–83). One cohort found significantly higher live birth rates when 15 or more eggs were frozen, irrespective of age.
That falls in the 15–30 band.
Your result of 18 eggs sits in the highlighted band. Bands are reference points used alongside clinical findings — not a diagnosis.
Usually two to three cycles. Still a realistic plan for most people.
Hirsch et al., Human Reproduction Update 2024 (systematic review and meta-regression): live birth 28% per patient overall; 52% (95% CI 41–63) if frozen at ≤35; 19% (95% CI 13–29) if frozen at ≥40; oocyte survival 78.5% (95% CI 74–83). One cohort found significantly higher live birth rates when 15 or more eggs were frozen, irrespective of age.
These tools apply across the process rather than at one point in it.
Proportions of the figures you entered above. Percentages are of the total shown, and are arithmetic on your own numbers — not a benchmark.
One published cohort found a significantly higher live birth rate when 15 or more eggs were frozen per patient, irrespective of age at freezing. It is a useful planning anchor, though not a guarantee.
It is the pooled average across all ages, which makes it a poor planning number for any individual. Use the figure for your age band, and treat both as population averages with wide confidence intervals.
Around 78.5% in the pooled meta-analysis, though it varies by laboratory. Ask your clinic for its own thaw survival rate — it directly changes how many eggs you need.
A calculator sees three or four figures. A specialist sees your history, your scans, your partner's results, and how you actually responded to treatment. If you're between cycles, changing clinics, or something in your results doesn't add up, a second opinion is the fastest way to find out whether anything would be done differently.
Free first consultation. No obligation to start treatment, and it doesn't affect your care at your current clinic.
Published live birth rates per patient from planned oocyte cryopreservation. These describe women who returned and thawed their eggs — most people who freeze never do. Nothing here is a diagnosis or a substitute for assessment by a clinician.
A calculator gives you a number. These explain what it means, and what it does not.
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