Ovulation Calculator
Predict your ovulation and fertile window
days
Formula
Ovulation = LMP + (Cycle Length - 14) days
Ovulation typically occurs 14 days before the next period.
Examples
28-day cycle
Ovulation on day 14, fertile window days 9-15.
Frequently Asked Questions
About Ovulation
Predict ovulation and fertile window based on menstrual cycle length.
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