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Cycle Risk

Cycle Risk Calculator

Estimate fertile days and relatively lower-risk days. Calendar-based methods are not reliable contraception.

Cycle details

Cycle phases will appear here.
Fertile window
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    Method and FAQ

    This page estimates fertile days around the expected ovulation date and labels other days as relatively lower risk. Because ovulation can shift, results are for cycle awareness only.

    FAQ

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    Important: Ovulation can shift earlier or later. This page is for awareness only and should not be used as your only contraception method.