Commonly used contraceptive methods include intrauterine device (IUD), drug contraception, external contraception and others. Different methods have their own applicability, advantages and disadvantages, and there is no one best. 1. Intrauterine device (IUD): It is a safe, effective, simple and reversible method. It is a safe, effective, easy and reversible method of contraception by affecting the implantation of the fertilized egg. There are copper-containing intrauterine devices, drug-containing intrauterine devices and so on. It is suitable for women in their reproductive years who have no contraindications and require the placement of a birth control device. Women who are pregnant or suspected to be pregnant, allergic to copper, have genital tumors or malformations, or have serious systemic diseases are prohibited to place the IUD. 2. Pharmacological contraception (1) Oral contraceptives: there are short-acting contraceptives (such as compound norethindrone tablets) and long-acting contraceptives (such as ethinyl estradiol). The former has an effective rate of nearly 100% when used correctly, and the latter reaches 96% to 98%. (2) Long-acting contraceptive injections: there are single progestin preparations or estrogen-progestin combination preparations. The effective rate is up to 98%, and the contraceptive can be used for 1 month. It has less effect on lactation, so it is suitable for contraception for lactating women. (3) Slow-release contraceptives: mainly progestin, can achieve long-term contraceptive purposes. Such as subcutaneous implants (single progestin preparation, can be used for 5-7 years), slow-release vaginal contraceptive ring (can be contraceptive for 1 year). 3. External contraception: such as the use of penile condoms, external spermicide. The former also has the effect of preventing the transmission of sexually transmitted diseases. 4. Other: such as the use of drugs such as mifepristone emergency contraception, or safe period contraception. The specific choice of contraceptive methods, you can consult a professional physician’s opinion.