The chances of getting pregnant with a single episode of in vitro fertilization are about 20%, and it is only 80% effective as a contraceptive. This is due to the fact that a small amount of prostate fluid has already entered the woman’s vagina prior to the in-vitro fertilization, 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 relatively low, but the individual if pregnant, the chances are 100%, so it is best for women not to use this method of contraception contraception. If you want better contraception, you can use condoms or take short-acting birth control pills. Both of these methods are highly effective contraceptive methods and are more effective.