If a condom is used throughout the entire sex life, that is, from the beginning to the end of the sex life, and the condom does not fall off, there is no breakage, then it will not be pregnant, because the condom’s contraceptive effect is very good and the side effects are very few. However, if you use a condom when you are about to ejaculate and do not use a condom for the rest of the time, you may get pregnant, mainly because when you are about to ejaculate, men will secrete prostate fluid, which will contain a small amount of sperm, and so you may also get pregnant. In addition, if the condom slips or breaks during use, the semen will flow into the vagina and the sperm will enter the uterine cavity, reaching the fallopian tubes and combining with the egg to form a fertilized egg, which can lead to pregnancy. Therefore, even if it is the first time you use a condom, if you use it incorrectly or if there is an accident, it can lead to pregnancy.