Mirena, the English name, is a kind of contraceptive ring with hormone invented by a Finnish scientist Luukkainen, currently it is a product produced by Bayer in Germany and is available in the Chinese market. Mirena is a kind of contraceptive ring (intrauterine device), but the difference and the traditional contraceptive ring, about 32mm in length, a little like a small grass in shape, the basic material is plastic (so it is possible to do MRI when placed in Mirena), which contains 52mg of levonorgestrel pregnancy (a kind of progestin), which can release a trace amount of 20 micrograms per day for about 5 years or so. Progestin can make the mucus of the cervix sticky and the endometrium thin, which affects the fertilized egg’s implantation. Therefore, Mannorrhea is also a method of contraception, and its one-year failure rate is about 0.2% among various contraceptive methods, and its 5-year cumulative failure rate is about 0.7%, which is a relatively efficient contraceptive measure. Because it can release progesterone locally in the uterus, which can inhibit the endometrium, most people will experience reduced menstruation or even amenorrhea after IUD placement. For patients with heavy menstrual flow, Mannax can be very effective in reducing the effect of heavy menstruation. Although the treatment of endometriosis, myometriosis and endometrial hyperplasia is not written in the instruction manual, many doctors in the clinic use Mannorrhea for the treatment of endometriosis, myometriosis, endometrial hyperplasia and PCOS, because the progesterone released by Mannorrhea can inhibit the growth of endometrium caused by anti-estrogen, so it can reduce menstrual flow, relieve dysmenorrhea and reverse It is also preferred by patients because it can avoid the side effects of long-term oral medication. The main side effect of Mannorrhea is that it causes menstrual dribbling, especially during the first six months, which generally decreases over time. About 10-20% of patients experience amenorrhea one year after the placement of Mannatech, but this amenorrhea does not affect the health of the body, as menstruation is not detoxification and the absence of menstrual blood does not affect the health. Unlike the oral contraceptive pill, the use of Menstrual Lactation is not likely to cause obesity. If you want to have children, you can remove the IUD immediately afterwards and try to conceive. The IUD can be placed in the family planning department or gynecology department of a larger hospital, usually during the dilatation of the cervix during menstruation, usually in an outpatient clinic, without anesthesia. For patients with a uterine cavity greater than 9 cm in depth and a large uterus, IUD placement is often attempted after reducing the size of the uterus with a GnRH-a injection prior to IUD placement. The IUD can also be placed during postpartum breastfeeding, but only after 6 weeks of delivery.