The chance of getting pregnant from an in vitro ejaculation is about 20%, and it is only 80% effective in preventing pregnancy. This is due to the fact that a small amount of prostatic fluid has entered the woman’s vagina before the in vitro ejaculation, which can be mixed with a small amount of sperm that can enter the woman’s uterine cavity and fallopian tubes and meet with the egg, thus leading to pregnancy. So although the chances of getting pregnant in this case are low, the chances are 100% if the individual gets pregnant, so it is best for women not to use this method of contraception. If you want better contraception, you can use condoms or take short-acting pills. Both of these methods are highly effective contraceptive methods and are more effective.