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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
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Your average cycle length (days)
How long did it last (days)?
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Woman pondering emotions during ovulation: Understanding the link between ovulation and emotional changes.
Have you ever noticed that around the middle of your cycle, your mood changes for a few days? It might be a sign of ovulation symptoms. Although the ovulatory phase of a menstrual cycle is the shortest, it’s also the most significant one.
Strange Pre-Menstrual Dreams - Visual guide exploring the mystery and hormonal influences behind unusual dreams before menstruation.
The reasons behind our sometimes surreal, vivid, and emotional dreams have long been a mystery. Many people who menstruate report having odd, striking dreams right before menstruation. The reasons behind this phenomenon are hidden in our hormones.
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.