If you do not use contraception during sex and ejaculate inside your body, it is recommended to take the oral emergency contraceptive pill to remedy the contraception. When semen enters the vagina, there is a possibility of pregnancy, so taking the oral emergency contraceptive pill is an effective way to avoid the risk of unwanted pregnancy. However, it should be noted that the emergency contraceptive pill has significant side effects and is not recommended to be taken more than three times in a year, nor should it be used as a regular means of contraception. You should still use condoms, short-acting contraceptives, long-acting contraceptives and other contraceptive measures on a daily basis to be able to reduce the damage to your body.