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MyMonthlyCycles Quiz Return to Index
Menstrual Cycle Length Quiz
How is menstrual cycle length defined/calculated?
It's the number of days your period lasts.
It's the number of days from day 1 of one cycle to day 1 of the next cycle.
It's the number of days from day 1 of one cycle to the day before day 1 of the next cycle.

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