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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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Understanding the risks and benefits of the Free Bleeding Movement and its impact on menstrual health and feminine hygiene.
Menstruation—is it a blessing, a curse, or an inconvenience? Regardless of how we choose to look at it, menstruation is a sign of reproductive health. Some women are now choosing to embrace the natural flow of their period blood.
Balancing Act: The Intersection of Diet and Menstrual Wellness.
A woman's diet directly affects her hormones and menstrual cycle. Paying attention to what you eat can produce a more regular, less painful period, and a healthier state of mind.
Woman experiencing emotional symptoms of Premenstrual Dysphoric Disorder (PMDD) during menstrual cycle.
As hormone levels begin to drop after ovulation, most women experience some changes in their physical and mental state such as tender breasts, bloating, or moodiness. Such symptoms are often linked with Premenstrual Syndrome, or PMS. For those of us who suffer from Premenstrual Dysphoric Disorder, or PDD, the symptoms—especially those having to do with emotions—are noticeably more severe.