If you don’t want to get pregnant it is recommended to use good contraception, such as condoms, birth control devices, and also oral short-acting contraceptives. Long-acting contraceptive pills have relatively large side effects and are best not taken. The best time to get on the birth control device is 3-7 days after the menstruation, which can reduce the amount of bleeding. If you have intercourse without contraception, there is a chance of pregnancy can reasonably take emergency contraceptives, such as Yutin, etc. This contraceptive pill is best taken within 72 hours afterwards, so that the contraceptive effect is better, so as to avoid the need for abortion after pregnancy, which is very harmful to the body. However, you can not take the safe period contraception method, ovulation can be affected by the environment, emotions, etc., can appear early or delayed, so the effect of safe period contraception is uncertain. The actual fact is that you should pay attention to vulva hygiene, keep your vulva clean and dry, and wash both sides at the same time before and after intercourse to prevent gynecological infections, and pay attention to sexual life not too often.