Ovulation is a sensitive health marker, and knowing when it occurs is essential for conception, as the fertile window is limited to the 5 days before and the day of ovulation.

“If ovulation and knowing when you ovulate is one of your most sensitive health markers and really essential information in trying to get pregnant. If you are trying to get pregnant, the egg only lives for 24 hours. The fertile window is the 5 days before and the day of ovulation. Meaning sperm can live in the reproductive track for up to 5 days. Most will stay around for 2 days. That's why the two days before and the day of ovulation have a 20 to 30% chance of getting pregnant compared to a zero day the day after ovulation. 0%. It's a very defined fertile window.”