Fertility preservation · 4 min read
There is no perfect age to freeze your eggs — but biology, evidence and personal circumstances all play a part. The earlier you freeze, the higher the chance those eggs will lead to a baby in the future, but freezing too early may also mean storing eggs you never need.
Fertility naturally declines with age, particularly from the mid-30s onwards, as both the number and quality of eggs reduce. The Royal College of Obstetricians and Gynaecologists (RCOG) notes that a noticeable decline in egg quality usually begins around age 35, with a steeper drop after 37.
Most evidence suggests that eggs frozen in your late 20s or early 30s carry the best chance of leading to a future live birth. The HFEA reports that birth rates from frozen eggs are highest when eggs are frozen before age 35. Freezing later is still possible and worthwhile for many people — but typically means more cycles are needed to collect enough eggs to give a realistic chance of success.
Two people of the same age can have very different ovarian reserves. Tests such as AMH (anti-Müllerian hormone) and an antral follicle count give a more individual picture of how your ovaries are likely to respond — and are part of a thorough fertility assessment.
Some people have a medical reason to consider egg freezing earlier — for example before chemotherapy or radiotherapy, for conditions linked to early menopause, severe endometriosis, or before gender-affirming treatment. In these situations the NHS may be able to provide fertility preservation on clinical grounds.
Egg freezing is a personal decision that balances biology, finances and life plans. A consultation is the best way to understand what your own results suggest. You can read more about how fertility changes over time and explore our wider treatment options.
