Fertile window

The fertile window is the five days before ovulation plus the day of ovulation itself, because sperm can survive in the reproductive tract for several days. Having sex every two to three days across the cycle covers this window without needing precise prediction, and is the approach Your Fertility recommends for most couples.

Also known as: fertile days, fertile period

Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.