Menstrual Cycle Calculator
A menstrual cycle calculator tracks the timing of periods, ovulation, and fertile windows based on cycle length and period duration. The average cycle is 28 days (range 21–35 days), with ovulation typically occurring 14 days before the next expected period.
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Tip: Cycle tracking apps are not reliable contraception. Only fertility awareness methods (FAM) with proper education provide effective natural family planning.
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