Topical contraceptive pills are also effective. The contraceptive solution is injected into the vagina before intercourse, and after intercourse the sperm is ejaculated into the posterior fornix, and the contraceptive solution kills the sperm so that they do not enter the uterine cavity and do not reach the fallopian tubes and cannot unite with the egg, so the purpose of contraception is achieved. If used improperly, it may also cause pregnancy. It is recommended to use it in strict accordance with the instructions, which will improve the chances of contraception. In addition, if you want to prevent pregnancy, you can use condoms during the whole process of intercourse, which is safe, hygienic and simple, and the contraceptive effect is also better, so you can adopt it in your daily life. If there is no plan to get pregnant within a long time, you can get an intrauterine birth control ring to prevent pregnancy.