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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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Insights into Feminine Health: Understanding Vaginal Discharge Variations.
Your nether regions can tell you a lot about your health. Listen while they whisper, so you don’t have to hear them scream.
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.
Unlocking Insights: Visual Guide to 5 Reasons to Track Your Cycle with WomanLog
Mobile period trackers have revolutionized access to data-driven knowledge about the female reproductive cycle. Not long ago, all we had was a calendar, a pen, and our own questions. Now, period trackers make it possible to record the daily progress of your menstrual cycle and the symptoms you experience, pinpoint ovulation, predict when your next period will start, help you get pregnant or avoid pregnancy, and much more—all in one simple app on your phone.