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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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Sleeping peacefully during menstruation: Strategies to tackle insomnia and fatigue.
Feeling exhausted when your period starts? You are not alone. Lack of energy just before and during menstruation is very common. Many women feel sleepy and lethargic during that time of month. To live through this phase of the menstrual cycle more serenely it is important to understand what is happening in your body and to take good care of yourself. Finding the right solution for menstrual insomnia means solving a great contradiction: what exhausts you during the day, prevents you from sleeping at night.
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.
Harmonizing Health: Understanding and Managing Premenstrual Syndrome (PMS).
Headaches. Sore breasts. Mood swings. Irritability. Cramps. Fatigue. Trouble sleeping. Bloating. Food cravings. Acne. PMS is not kind.