Condom contraception is 80% effective, and condoms have very few side effects. They are the most commonly used contraceptives in daily life. Science shows that the probability of pregnancy with a condom is approximately 15%, but if worn correctly, the chance of pregnancy is 3%. Therefore, when men and women have sex, if they want effective contraception, they must wear the condom correctly. Since condoms are easily torn, any tears can affect the effectiveness of contraception.
1. However, there are some situations that may affect the probability of contraception. For example, some people do not wear condoms from the beginning of sexual activity but only wear them when they are about to ejaculate, which may lead to the possibility of pregnancy for their wives. This is because premature ejaculation or unconscious ejaculation may occur during intercourse. Others forget to squeeze out the air in the nipple before using the condom, resulting in the condom bursting due to the expansion of air inside the sac caused by heat or increased pressure inside the sac after ejaculation, and semen flowing into the vagina, causing contraception failure.
2. In addition, some people do not pinch the opening of the condom tightly during ejaculation, which can also reduce the risk of contraception. This is because when the penis is withdrawn from the vagina, the elastic band at the opening of the condom loses its function due to the penis's softening and shrinking after ejaculation, resulting in semen flowing back into the vagina. Others may improperly store the condom, such as leaving it in direct sunlight or near a heater.
