Fertility basics
For a healthy couple in their twenties, fecundability is roughly 20 to 25 per cent per cycle, falling gradually through the thirties and more steeply after 40. It explains why conception often takes several months even when nothing is wrong.
Also known as: monthly chance of conceiving, per-cycle chance
Related Canada guides
Sources
- Society of Obstetricians and Gynaecologists of Canada (SOGC) patient information
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.