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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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Cycle of Wellness: Navigating the Phases of the Monthly Cycle.
Your monthly cycle is more than having your period every month. There are changes in your body that manifest both visibly and invisibly, affecting you more than you may realise.
Unraveling the Menstrual Cycle Timeline: Understanding Duration and Phases.
There is quite a lot of variability in the menstrual cycle. The average cycle is 28 days long, but anything from 21 to 35 days is considered normal. Tracking your menstrual cycles can help you understand what is normal for you. This will also help you notice irregularities, such as a delayed or missed period, or spotting.
Untangling Delays: Exploring Reasons Behind a Late Period.
A regular period is a sign of overall good health. If it doesn’t arrive when it should, we worry. Most women experience some variability in their menstrual cycles. How familiar are you with yours?