Health
Ovulation Calculator
Estimate your ovulation date and fertile window based on your last menstrual period and cycle length.
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Frequently Asked Questions
When do I ovulate?
Ovulation typically occurs 14 days before your next period. For a 28-day cycle, that's around day 14.
What is the fertile window?
The fertile window is the 5 days before ovulation plus the day of ovulation itself — 6 days total when pregnancy is possible.