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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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Differences in Menstrual Blood Flow
Menstruation, by definition, comes with flow—the cyclical discharge of the uterine lining. Just like is says on the packaging of feminine hygiene products, your flow can be light, heavy, or “normal.” But normal will be different for different bodies.
Illustration depicting the phenomenon of period poops and its causes.
Periods are messy. They affect our health, moods, and well-being, and they are just annoying to deal with. From painful cramps to pimples and bloating, our hormones just won’t give it a rest. In this article, we look into a little-discussed but common phenomenon—period poops. That’s right, as if bleeding, pain, and mood swings weren’t enough, being locked in your bathroom for hours can be the cherry on top.
Period Calculator - Visual representation of a tool to estimate menstrual cycles, ovulation, and fertility for reproductive planning
Cycle tracking with an accurate period calculator can help you better understand your body and your health. Learn the benefits of using a period calculator and try it for free on WomanLog!