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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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WomanLog app – safe and private period tracker, does not share or sell user data
At WomanLog, your personal information is always private and secure. We never share or sell your data to third parties. Your privacy is our priority. You can also read an independent study that confirms this.
Discovering Effective Relief Strategies for Menstrual Pain.
Shark week. The crimson tide. Riding the cotton pony. The many, creative terms we have for periods offer little comfort when it’s time for dealing with the unpleasantries that accompany it.
Understanding the link between ovulation and anxiety in women's health.
Ovulation is, in many ways, the high point of the menstrual cycle. Fertility peaks, as does the body’s ability to withstand pain. You are at your best both mentally and physically. Why, then, is anxiety something many women report experiencing during ovulation?