Contraception refers to the measures and behaviors made to prevent pregnancy in female patients during intercourse, in order to achieve the purpose of birth control need to take certain contraceptive methods, usually drug contraception and surgical contraception, etc., the specific analysis is as follows: a. Drug contraception: steroid hormone contraceptives are usually used to achieve the purpose of contraception, generally short-acting oral contraceptives, long-acting oral contraceptives, visiting oral contraceptives and subcutaneous implants The first of these is to inhibit the production of eggs. Surgical contraception: 1, intrauterine device: IUD is a contraceptive device placed in the uterine cavity, with the effect of contraception, but also does not affect normal life; 2, female tubal ligation or male vasectomy: generally used for permanent birth control patients, usually the male patient’s vas deferens or the female patient’s fallopian tube cut off, so that the sperm or eggs can not pass, thus causing the permanent 3, subcutaneous implantation method of contraception: mainly in the patient subcutaneous implantation of a progestin containing a certain dose of silicone rods to achieve the effect of contraception. Third, tool contraception: 1, penis condom: worn on the penis before intercourse, male ejaculation sperm will be stored in the penis condom, can not enter the female body; 2, female condom: placed in the female vagina before intercourse, also called vaginal condom, can stop the inflow of semen into the uterine cavity. However, it is not suitable for women who are allergic to the material and patients with II degree uterine prolapse. Fourth, physical contraception: physical methods such as microwave and laser make it impossible to produce sperm, or damage the normal function of sperm, mainly for patients with male birth control. However, this method may cause functional damage to the epididymis, etc. Since contraceptive methods are different, there are different indications and contraindications, so it is recommended to choose the appropriate contraceptive method under the guidance of a doctor.