Ovulation Calculator

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Our ovulation calculator will tell you the days when you’re most likely to be fertile within the next month. Put in how long your cycle usually lasts and then the first day of your last period.

Please note: This ovulation calculator too provides approximate dates only for a regular menstrual cycle and should only be used as a guide. It does not replace the medical advice of your own doctor.

Your average cycle length :

The first day of your last period