Subcutaneous implantation is the implantation of a certain dose of progesterone into the silicone capsule tube, buried under the skin, the slow release of progesterone, to play a contraceptive effect. With certain side effects, due to the hormone contained, some people may appear obese performance, but not absolutely, because this is progestin, not glucocorticoids, does not have obvious obesity effect. This small amount of hormone, the ovaries will also be secreted, after artificially given, can affect the endocrine function of the ovaries, and due to the uneven release of hormones, it can lead to menstrual disorders, vaginal spot bleeding, nausea, stomach upset. Generally women over 40 years old try to avoid it. Subcutaneous implantation can be performed at the same time as abortion or within 7 days of menstruation.