Calculate the best

time to conceive.

With just one click.

Simply enter the first day of your recent period and the length of your menstrual cycle here and our calculator will tell you your most fertile days for the next two months.*



* Important: The fertility calendar is based on straightforward averaging. We strongly advise against using the calendar as a means of contraception.

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How can I increase my probability of becoming pregnant?

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Our fertility calendar ...

... for individual calculation of your fertile days.

Try it out...more...

NUK Expert Petra Fricke

... advises you on proper nutrition during and after pregnancy.

To the Q&A Session...more...