When you wear a condom during intercourse, as long as the condom doesn’t break and no semen comes out, you usually won’t get pregnant. Wearing a condom prevents male sperm from entering the woman’s uterine cavity and reduces the chance of pregnancy. However, if the condom is not worn throughout intercourse or if it breaks, it may fail to prevent pregnancy, which can lead to pregnancy even if the woman is wearing a condom during intercourse. You need to choose good quality condoms and avoid using poor quality condoms to prevent them from breaking during intercourse. In addition, you need to check the condom before intercourse to prevent any holes in the condom, so that semen can leak out. You need to wear a condom throughout intercourse. The use of condoms is one of the better contraceptive measures, convenient and does not affect the health of the body. Purchase condoms must go to the regular drugstore to buy, after coitus any physical discomfort should be timely to the hospital, by the doctor a clear diagnosis, and cooperate with the doctor symptomatic treatment.