It is not recommended to wash the vagina daily with a washing machine during the preparation for pregnancy, but the vulva should be washed daily. Although it is important to keep yourself healthy during the preparation period, the vagina should not be douched excessively because it contains its own flora, which is in dynamic balance on a daily basis and can provide a protective effect against inflammation. Daily douching may upset the balance within the flora, which in turn increases the risk of infection. After sex, semen enters the vagina for a period of time and liquefies into a liquid that flows out of the lower body, so douching is generally not necessary after sex. However, it is necessary to wash the vulva every day during pregnancy and after sex to prevent bacteria from entering the vagina or the urethra and causing infections.