Washing immediately after intercourse will flush out most of the semen, which will reduce the chances of pregnancy, but it will not achieve 100% contraception. If a sperm enters the uterine cavity and reaches the fallopian tube, it is possible that it will unite with the egg and form a fertilized egg and become pregnant. So it is recommended that if you have a douche, you should also take the oral emergency contraceptive pill to give contraception if necessary, in order to achieve a better contraceptive effect. In addition, it is recommended that if you are not planning to get pregnant, it is relatively safe and easy to use contraceptive measures that are effective and hygienic, that is, to use condoms during the whole process of sexual life. So it is recommended that this method of contraception can be adopted, if it is given after intercourse to wash, no longer use other contraceptive measures may be pregnant.