Why is douching not an effective method of contraception?

Douching is not an effective method of contraception because it does not prevent sperm from reaching the egg; sperm can swim against the flow of fluid. Additionally, douching can disrupt the natural vaginal flora and pH balance, potentially leading to infections and other health issues. It may also give a false sense of security, leading individuals to forgo more reliable contraceptive methods. Therefore, it is not recommended as a contraceptive practice.