Failure to wear a condom during the first part of intercourse and wearing it later may result in pregnancy, and sperm may enter the uterus. It is recommended to use contraception when there is no requirement to have children, or to take oral contraceptives if the safety measures are incomplete. It is possible to get pregnant by not wearing a condom before intercourse and then wearing it later. Because sperm does not only enter the woman’s uterus by way of ejaculation, men carry a small amount of sperm in their prostate fluids, and not wearing a condom in the early stage may cause a small amount of sperm to enter the woman’s uterus, and pregnancy is possible in this case. It is recommended that contraception be used correctly to prevent pregnancy when there is no immediate need to have children. If there has been a contraceptive failure, then you can take emergency contraceptive pills such as levonorgestrel tablets orally as prescribed by your doctor within 72 hours after intercourse to prevent pregnancy. If you do not want to have children, you should take safety precautions, and if you need to take medication, you should take it as prescribed by your doctor.