For women who do not want to have children, they can choose appropriate contraceptive methods during sex, such as the IUD, male condom, oral contraceptive pills and so on. If you have already checked the pregnancy and do not want to have children, if conditions permit, you can choose to medication abortion or surgical abortion and other methods. First, not pregnant: 1, the IUD: for women who are not pregnant, if there is no intention to have children for the time being, you can have an IUD contraception, contraceptive rate of up to 99%, but due to the operation of the uterine cavity in this way, some patients may have irregular vaginal bleeding, abdominal pain and other discomfort; 2, the male wearing a condom: is a more commonly used contraceptive methods, but also to prevent sexually transmitted diseases, the overall contraceptive rate of 70% -80%; 3, oral contraceptive drugs, oral contraceptives and other methods. Oral contraceptives: there are many kinds of contraceptives, such as short-acting contraceptives, morning-after pill, etc., but they are not used as regular contraceptive methods, especially the morning-after pill will cause menstrual disorders; 4, other contraceptive methods: such as extracorporeal spermulation, safe period contraception, etc., but the rate of contraception is not high, and it is not recommended to use them. Second, already pregnant: 1, medication abortion: if a woman is already pregnant and does not want to give birth to a child, you can choose medication abortion, you need to carry out this operation within 49 days of pregnancy, and need to carry out ultrasound examination before the medication abortion, to exclude the possibility of ectopic pregnancy, and measure the size of the fetal capsule, if the fetal capsule is more than 2.3cm, then it is not suitable for the use of this method; 2, surgical abortion: according to the number of weeks of pregnancy, you can choose the negative pressure suction, painless abortion or clamp scraping. or pincer scraping, etc.