In the process of coitus, if you do not take effective contraceptive measures, such as wearing a condom or placing a birth control device, the use of extracorporeal ejaculation is not a contraceptive measure, there is a great possibility of failure. The key to look at the time of coitus is in the risk period, if close to ovulation, this coitus has the possibility of pregnancy. If you don’t ejaculate when your period has just cleared or is about to come, the possibility of pregnancy is very small. If you are not sure, you can check the urine pregnancy test after half a month to rule out pregnancy. It is recommended that you try to use a condom when you have sex, and don’t take extracorporeal ejaculation. Because in the process of intercourse, it is inevitable that there is semen spillage, once lead to pregnancy is 100%, or cautious for good.