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What day did your last menstration start?

How many days does your menstruation last?

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How many days does your cycle last?

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From the 1st day of one menstruation to the 1st day of the next

Note that this is only an estimate of your menstrual cycle
BEFORE PERIOD
1st DAY OF PERIOD
PERIOD DAYS
AFTER PERIOD
OVULATION DAYS
Note that this is only an estimate of your menstrual cycle