How To Prevent Pregnancy Using Calendar Method. In conclusion, the calendar method can bе a safe and effective way to prevent pregnancy for some couples. Learn about the calendar method, an effective approach to preventing pregnancy by tracking your menstrual cycle and identifying fertile days.
To prevent pregnancy, you should avoid sexual intercourse or use a barrier method of birth control from the time you first notice any cervical mucus. People using the rhythm method analyze their past menstrual cycles to determine their fertile days.