Douching after intercourse is not contraceptive, but may reduce the chances of pregnancy. If no contraception is used during intercourse, even vaginal douching will not work as a contraceptive. This is because if you ejaculate during intercourse, a small amount of sperm will not just stay in the vagina, but will travel up the cervical canal to the uterine cavity and fallopian tubes, which can then lead to pregnancy. When douching is performed after intercourse, some of the sperm have already entered the uterine cavity and douching cannot completely expel the sperm from the body, but can only wash away part of the sperm present in the vagina. In addition, there are many folds in the vagina and some of the sperm may remain when the douching is incomplete. The sperm are somewhat energetic and may enter the uterine cavity along the cervix. Intravaginal douching after intercourse still has a certain chance of pregnancy and is not recommended as a method of contraception. If you want to use contraception, it is recommended that you choose more effective contraceptive methods, such as using condoms throughout intercourse, oral short-acting pills, or, in some cases, intrauterine devices for women after childbirth. In case of contraceptive failure, emergency contraceptive pills can also be taken within 72 hours after sex as a remedial measure.