The principle of contraceptive implantation is to bury silicone tubes containing progestin under the skin of women, slowly releasing a small amount of progestin to interfere with the process of sperm and egg union, thus playing a role in contraception. Before doing buried contraception, some routine examinations should be carried out, such as routine blood tests, four blood clotting tests, liver and kidney function tests, infectious disease tests, etc. There are some contraindications for subcutaneous implantation, such as severe anemia or hypertension, frequent headaches, hyperthyroidism, breast cancer, diabetes, etc. Subcutaneous implantation cannot be done for contraception. Subcutaneous implantation is usually performed within 7 days after menstruation or at the same time after abortion. The operation is simple, usually a small hole is cut on the inner side of the left upper arm and a silicone tube is implanted, the incision does not need to be closed and the operation can be completed in a few minutes.