Egg Freezing Success Rates by Age (UK guide)

Egg freezing success depends heavily on the age at which eggs are frozen. This guide explains how success rates vary, how many eggs are typically recommended per age group, and what factors can influence the likelihood of a future pregnancy. How Age Affects Success Rates Egg quality declines with age, particularly after 35. Younger eggs have higher implantation potential and lower rates of chromosomal abnormalities. Approximate Live Birth Rates per Frozen Egg These estimates assume eggs are thawed and used in IVF later: | Age at Freezing | Estimated chance per egg | |---|---| | Under 30 | 6–12% per egg | | 30–34 | 5–10% per egg | | 35–37 | 4–7% per egg | | 38–40 | 2–5% per egg | | 40+ | < 2% per egg | Success rates improve significantly with a larger number of eggs. How Many Eggs Do You Need? General guidance: Age < 35 → 12–20 eggs Age 35–37 → 15–25 eggs Age 38–40 → 20–35 eggs Age 40+ → often multiple cycles needed What Affects Egg Freezing Success? age at freezing ovarian reserve (AMH, AFC) clinic lab quality stimulation protocol number of eggs retrieved thaw survival rate sperm quality (if used to create embryos later) Related Guides Understand Egg Freezing Costs Egg Freezing Costs UK — full breakdown of treatment costs IVF Costs in the UK — compare to fresh IVF costs IVF Medication Costs — medication expenses for retrieval cycle Understand Your Fertility Status AMH Test: Wha