Egg freezing: medical, age-related, social. What the numbers actually look like

Reviewed by HHH Clinical Team · April 2026

1 section · 2 min read

Fertility & Treatment

2 minHHH clinical team

DOES EGG FREEZING ACTUALLY WORK, AND IS IT RIGHT FOR YOU?

Does egg freezing actually work, and is it right for you?

Egg freezing covers three quite different situations that get talked about as if they were one thing. Medical egg freezing happens when treatment for cancer, autoimmune disease, or other conditions threatens future fertility. Age-related egg freezing happens when someone wants children later than their biology naturally supports it. Social or elective egg freezing happens when life circumstances such as career, relationship status, or readiness mean the right time has not come yet. The clinical procedure is similar across all three. The numbers, success rates, and conversation are not.

The grey zone

How likely am I to have a baby from frozen eggs later?

Standard position · Europe

Cobo et al 2018 quantified live birth rates per oocyte (egg) frozen by age at freezing. Roughly: women under 35 had around a 7 to 8 per cent live birth rate per egg frozen; women 36 to 39 had around 5 per cent per egg; women 40 and over had below 3 per cent per egg. Most clinics now counsel based on this kind of data.

Where it gets more nuanced

What we honestly do not know

We do not have great long-term data on the very oldest cohorts who froze eggs, because the technology is recent enough that most who froze eggs in their 30s have not yet returned in their 40s. We do not know how much storage limits matter for individual outcomes since many countries cap storage duration at 10 years.

Bottom line

Egg freezing buys you future options. It does not buy you a baby. The expected return on each egg is age-dependent and the headline 'live birth rate' a clinic quotes may be cumulative across multiple cycles, not per-egg or per-cycle. Ask which definition they are using.

References

[1] 30383235Cobo A et al. Elective and onco-fertility preservation: factors related to IVF outcomes. Hum Reprod 2018;33(12):2222-2231.
[2] hfea-uk-fertility-treatment-2024Human Fertilisation and Embryology Authority (HFEA): Fertility treatment 2024, preliminary trends and figures.

Browse the full evidence library →

For your doctor

Patient considering elective oocyte cryopreservation. Requests fertility assessment (AMH, AFC, FSH) and counselling on age-stratified live birth rates per oocyte and likely number of cycles required to bank a meaningful cohort.

I am considering egg freezing. Could I have a fertility assessment, and could we discuss what number of eggs I'd need to bank for a reasonable chance of a future pregnancy at my age?

How did this land with you?