Going to douche right after having sex can have an effect on pregnancy. This is because if a woman takes a shower or douches immediately after having sex, a large amount of semen will be discharged outside the vagina, which will reduce the chances of pregnancy. However, there is not absolutely no chance of pregnancy, because only part of the semen is washed away, while some sperm may have already entered the woman’s uterus, and the sperm inside the uterus cannot be washed away. So, if you plan to use the method of douching after intercourse to prevent pregnancy, it is very unreliable and will probably lead to failure.