Period calculator
Use the calculator to estimate the future period days and most fertile days.
The calculator is based on Rhythm method (Knaus–Ogino method), is valid for regular menstrual cycles and shall not be used as contraceptive method.
Use the calculator to estimate the future period days and most fertile days.
The calculator is based on Rhythm method (Knaus–Ogino method), is valid for regular menstrual cycles and shall not be used as contraceptive method.