The Mannuelle Ring, which is the Levonorgestrel IUD system, is shaped as a T-shaped ring that provides contraception and also treats excessive menstruation caused by non-organic pathologies. The levonorgestrel IUD system is a T-shaped ring with a white or off-white, simple drug core placed in the vertical rod of the T-shaped body, and a ring at the lower end of the vertical rod of the T-shaped body, which is fitted with a take-out tail filament. Levonorgestrel intrauterine system, mainly placed in the uterine cavity, can prevent the combination of sperm and egg, thus playing the role of contraception, in addition to the slow release of levonorgestrel, which is a kind of progesterone, can act on the endometrial lining of the uterus, for menorrhagia has a certain therapeutic effect. It cannot be used if pregnancy is suspected or if you are already pregnant, and it cannot be used if you have pelvic inflammatory disease or infections of the lower genital tract or postpartum endometritis, or if you have progesterone-dependent tumors. There may be adverse reactions to the use of the levonorgestrel IUD system, mainly changes in menstrual patterns after use. There is also an increased risk of ectopic pregnancy.