Sperm can also get pregnant if they are in the vaginal opening because sperm move, and some of them move fast, and those in the vaginal opening move fast to reach the cervix and enter the uterine cavity to reach the fallopian tubes. If it happens to coincide with ovulation, then it unites with the egg to form a fertilized egg and you become pregnant. In clinical practice, if you are not planning to get pregnant, it is advisable to use condoms during sex to prevent pregnancy. It is also possible to have an IUD for contraception, because the IUD is one of the reversible methods of contraception. If a pregnancy is planned, it can be removed 3 months in advance so as to avoid the possibility of causing a pregnancy that would clinically require a termination, and if no pregnancy is planned, it is recommended to take good contraceptive measures. Because extracorporeal ejaculation as well as sperm in the vaginal opening can lead to pregnancy.