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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 Impact of Cannabis on Menstruation: Exploring How Marijuana Influences the Menstrual Cycle.
Cannabis and the various products derived from it are slowly becoming legal for recreational and medicinal uses in many places around the world. The painkilling and relaxing properties of cannabis make it an enticing option for the treatment of menstrual pain and PMS-related symptoms. Interestingly, many women report noticing differences in the effect produced by cannabis products depending on where they are in the menstrual cycle. While research on the effects of cannabinoids—the active substances in the cannabis plant—is still ongoing, it is clear that the menstrual cycle has an effect on how a woman’s body reacts to outside influences, especially in the case of potentially addictive and psychoactive substances.
Decoding Unexplained Bleeding: Seeking Answers Beyond the Menstrual Cycle.
Contraceptives, STDs, the onset of menopause—a variety of conditions can cause vaginal blood flow during any time of the menstrual cycle. An accurate diagnosis will point to the most suitable treatment for you.
Insights into Menopause: Understanding Signs, Symptoms, and Causes.
Menopause is the time in the life of a woman when her periods stop, signalling the end of the reproductive function of her body. Both menopause and perimenopause (the transition to menopause) are associated with a number of symptoms that can significantly affect a woman’s quality of life.