The generic name of the Mannix Ring is Levonorgestrel Intrauterine Sterilization System (IUS), and discomfort such as headache, abdominal pain, changes in bleeding patterns such as heavier or lighter periods, dysmenorrhea, nausea, and breast pain occurs with the use of the ring. This birth control system releases progesterone locally in the uterine cavity in small amounts, which thickens the cervical mucus, prevents sperm from passing through and inhibits sperm viability, and also inhibits the function of the uterine lining, which reduces the amount and duration of menstrual bleeding, and therefore can be used for contraception and for menorrhagia caused by non-organic pathologies. The birth control system is effective for 5 years, and follow-up examinations are required 4 to 12 weeks after placement and annually thereafter. It may be partially or completely dislodged after placement, thus losing its contraceptive effect, in which case it should be removed promptly and a new birth control system can be placed. Contraindicated in the following conditions: established or suspected pregnancy; cervicitis; postpartum endometritis; recurrent or ongoing pelvic inflammatory disease; infected miscarriage within 3 months; infection of the lower genital tract; malignant lesions of the uterus or cervix; cervical dysplasia; congenital or acquired uterine anomalies; unexplained uterine bleeding; progesterone-dependent neoplasms; acute liver disease or hepatic neoplasms; and allergy to the system. If you need to use this system, please be sure to use it under the guidance of a doctor and strictly follow the doctor’s instructions, and do not use it on your own.