How Ovulation Works
Ovulation typically occurs 14 days before the next period, regardless of cycle length. For a 28-day cycle, that is day 14. For a 32-day cycle, it is day 18. The fertile window is the 5 days before ovulation plus ovulation day itself, as sperm can survive up to 5 days in the reproductive tract.
Ovulation Day = Cycle Length - 14
Fertile Window = Days (Ovulation - 5) to Ovulation Day
Frequently Asked Questions
This provides an estimate based on average cycle patterns. Ovulation can vary by several days based on stress, illness, and other factors. For more precision, track basal body temperature (BBT), use ovulation predictor kits (OPK), or monitor cervical mucus changes.
The fertile window is typically 6 days: the 5 days before ovulation and the day of ovulation itself. The most fertile days are the 2-3 days leading up to and including ovulation day. Sperm can survive 3-5 days; eggs survive only 12-24 hours after release.