Condoms can become pregnant if they are left inside and then taken out again, a situation that can lead to pregnancy. If the condom falls off during use, it means that the condom is not used correctly and the sperm will be left in the vagina and therefore can lead to pregnancy. Condoms must be used correctly in order to achieve contraceptive effect, and it is important to check if the condom seal is intact or if there is no air leakage before use. The condom should be worn at the beginning of sexual intercourse and should be worn the entire time, making sure that no semen comes out when it is removed. In the case of failure to use the condom, the remedy is the emergency contraceptive pill. The emergency contraceptive pill is effective within 72 hours after sex, and the earlier it is used the better the effect. In addition, the emergency contraceptive pill should not be used repeatedly, not more than 2 times in a year, otherwise it will easily lead to menstrual disorders and increase the probability of ectopic pregnancy.