The main reason for this is the following: First, the condom is not used scientifically, and when you start having sex without a condom, you wear a condom only when you are about to ejaculate, and before ejaculation you will secrete a lot of prostatic fluid, and the prostatic fluid will contain a small amount of sperm, and once the prostatic fluid is left in the vagina, the sperm will The first of these is that the woman will be able to get pregnant if she is not able to get to the house. The second is that the condom is broken when you wear it, and after the condom is broken, the semen will definitely enter the vagina along with the fissure, and this situation will also get pregnant. In addition, after having intercourse, it is important to check if the condom is broken, and if it is broken, it is recommended to take oral emergency contraceptive pills to remedy the situation.