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Period calculator

Use WomanLog's Period calculator to predict the next period days and to understand your menstrual cycle.

First day of your last menstrual period
How long did it last (days)?
Your average cycle length (days)
How long did it last (days)?
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Your average cycle length (days)
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One of the challenges women face is managing the inconvenience of menstruating while keeping up with all their usual obligations. We’ve compiled some helpful suggestions for keeping things fresh while you’re ‘on the rag’.
Shark week. The crimson tide. Riding the cotton pony. The many, creative terms we have for periods offer little comfort when it’s time for dealing with the unpleasantries that accompany it.
Contraceptives, STDs, the onset of menopause—a variety of conditions can cause vaginal blood flow during any time of the menstrual cycle. An accurate diagnosis will point to the most suitable treatment for you.