Fertility basics
With age, the number of eggs falls and a higher proportion carry chromosomal errors, which lowers the chance of pregnancy and raises the chance of miscarriage. Sperm quality also changes with age, more gradually. Individual experience varies widely.
Also known as: reproductive aging, fertility and age
Related United Kingdom guides
Last reviewed: 23 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.