It is less likely to get pregnant by intercourse when your period is not completely clean, but it is still possible to get pregnant if a woman ovulates irregularly. If you have intercourse when your period is not completely clean, ovulation usually does not occur at this time and pregnancy is less likely. However, if a woman has irregular ovulation, pregnancy is still possible. It is not recommended to have intercourse when menstruation is not completely cleared. This is because the opening of the uterus is open at this time, which is conducive to the discharge of menstrual blood. If you have intercourse at this time, bacteria, viruses and other pathogenic microorganisms can easily enter the uterine cavity through the open uterine opening, causing infection in the uterine cavity. If you have intercourse when your menstruation is not completely cleared, and you experience lower abdominal pain and fever after intercourse, you need to consider the possibility of uterine cavity infection, and it is recommended that you go to the hospital in a timely manner.