Shogo Makishima tools

Period Tracker

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Next period

Log a period

PeriodPredictedFertile window (estimate)

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Please read

Predictions are estimates from your own past dates. They get better after 3 or more logged periods and are less reliable if your cycles are irregular.

Do not use this as birth control or to plan a pregnancy on its own. The fertile window shown is a rough calendar estimate (about 14 days before the next expected period).

This is not medical advice. See a doctor if your cycles are usually shorter than 21 days or longer than 35 days, if a period is very late, or if bleeding is very heavy or painful.

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