In vitro ejaculation is a very unreliable method of contraception, because during sex, the male genital tract secretions will flow into the vagina, the secretions contain sperm, as long as there is sperm can cause pregnancy, if it happens to be during the female ovulation, the possibility of pregnancy is greater, so in vitro ejaculation is not safe. If you don’t have the requirement to have children, you must do a good job of effective contraception, commonly used contraceptive methods are male condoms, condoms can be used to avoid pregnancy, but before and after intercourse, to check whether the condom has broken, short-acting oral contraceptive pills for women, this contraceptive pill as long as not missed, the success rate of contraception is very high can reach more than 99%, and has the role of protecting the uterus and ovaries. It is one of the best contraceptive methods for women.