Fertile window

Sperm can survive several days in the reproductive tract, while an egg is fertilisable for around 24 hours. The highest chance comes from intercourse in the two to three days before ovulation. Having sex every one to two days across the middle of the cycle covers the window without needing precise tracking.

Also known as: fertile days, best time to conceive, ovulation window

Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.