FERTILE WINDOW Calculator

The best time to try and conceive is during the 'fertile window' of the menstrual cycle; this is different for different women. Fertile Window Calculator helps you understand the right time to get pregnant for different cycle lengths.

Select the first day of last period

How long is your average cycle?

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CAUTION: This tool cannot and should not be used to prevent pregnancy. Results are estimates and actual ovulation will vary for each woman.