Health & Fitness

What Is Ovulation?

Ovulation is the release of a mature egg from an ovary, which typically happens once per menstrual cycle. In an average 28-day cycle it occurs around day 14, but in general it happens about 14 days before the next period begins, so timing varies with cycle length.

Ovulation vs. Fertile Window

The egg survives about a day, but sperm can survive several days, so the fertile window spans roughly five days before ovulation plus the day of ovulation.

Estimating Timing

Calendar methods estimate ovulation from cycle length; ovulation tests and temperature tracking provide more individual information.

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🌸 Ovulation Calculator Estimated fertile window, ovulation date, and next period. Calculate → 👶 Pregnancy Due Date Calculator Estimate your due date based on your last menstrual period. Calculate →

🔗 Related Terms

Fertile Window Menstrual Cycle Luteal Phase Trimester

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Last updated: September 29, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.