Ovulation Calculator
Ovulation Calculator
What is the start date of your period?
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This is the first day of your most recent period. It’s used to estimate your next ovulation and fertile window.
What is the average length of your menstrual cycle?
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Enter the typical number of days between your periods. Most cycles range from 21 to 42 days.
This calculator estimates your ovulation date and fertile window based on your last menstrual period and average cycle length. This can help you time intercourse for conception.