The best time to do skin burial is during the menstrual period, when the menstrual flow is low, that is, within 7 days of menstruation can be operated. If women under 40 years of age are not suitable for intrauterine placement of birth control device or have serious side effects, they can use dermal implantation as a method of contraception. The long-acting contraceptive pills are slowly released by embedding them in the subcutaneous tissues of the upper arm and generally play a role in contraception after 24 hours, and the effective time of placement is 5 years, with a contraceptive rate of more than 99%, which will need to be removed after 5 years. Some women may experience a small amount of irregular vaginal bleeding or amenorrhea, weight gain and other unforeseen circumstances after the first placement of the subcutaneous implantation, this is a side effect of the contraceptive pill, do not worry, with the prolongation of the subcutaneous implantation time, this situation will gradually be improved.