Ovulation Calculator

This calendar helps you to track your ovulation day.

For best results enter in the dates of the first day of your last two menstrual periods. If you can not remember these two dates, then enter in the first day of your last menstrual period.

Start date of last menstrual period:

Menstrual period before the above (optional):

Most women have 28-32 day cycles and ovulation can take place between 11 and 21 days of the menstrual cycle. These days represent average cycles.

NOTE: Do NOT use this calendar to prevent pregnancy.

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