Ovulation itself typically lasts about 12 to 24 hours, which is the time a released egg remains viable for fertilization. The egg is released from the ovary and can be fertilized within this window; if not fertilized, it dissolves within approximately 24 hours. However, the fertile window, during which pregnancy is possible, is longer—about six days. This includes the five days leading up to ovulation plus the day of ovulation itself, because sperm can survive in the female reproductive tract for up to five days, waiting for the egg to be released.
Key Points About Ovulation Duration
- Ovulation event (egg release) is momentary, but the egg stays viable for 12-24 hours after release.
- The fertile window is approximately six days: five days before ovulation and the day of ovulation.
- If fertilization does not occur within this period, the egg breaks down, and menstruation follows about two weeks later.
Fertility Implications
- Having intercourse during the fertile window increases chances of conception.
- Sperm longevity (up to 5 days) extends the fertile period beyond the exact time of ovulation.
- Tracking ovulation can be useful for conception planning or birth control.
Thus, while the ovulation event itself lasts only about a day, the overall fertility period connected to ovulation spans around six days in a cycle.
