Ejaculation without ejaculation, or extracorporeal ejaculation, is a commonly used method of contraception that generally does not result in pregnancy, but can have sperm left in the vagina, and in rare cases, pregnancy can occur. Extracorporeal ejaculation is a means of contraception in which the penis is withdrawn so that semen is discharged outside the body when ejaculation is about to occur during sex, preventing the sperm from combining with the egg. However, it is possible to get pregnant in a few cases through extracorporeal ejaculation. Even if men do not ejaculate, when intercourse will be secreted prostate fluid there is a small amount of sperm, left in the vagina, wandering into the endocervical opening to obtain energy, thus combining with the egg to lead to pregnancy, in the ovulation of its chances of getting pregnant will also be increased accordingly. In short, when there is no intention to conceive, as far as possible to take scientific contraceptive measures, such as the use of condoms, etc., to prevent the occurrence of accidents.