Just after your period leaves is a safe period, and if your menstrual cycle is regular, you will not get pregnant in most cases if you have sex after your period ends. However, for insurance purposes, you can also use condoms to prevent unwanted pregnancies. Usually the week before and after ovulation is the danger period and the rest of the time is the safety period, but this method of calculating the safety period is not absolutely safe, mainly because each person’s menstrual cycle is different, so it is not absolutely safe either. Moreover, the timing of ovulation in women is also affected by many factors, such as the external environment, my emotions and personal physical condition.