Mirena® is an intrauterine device (IUD) that was originally approved by the FDA as an intrauterine contraceptive. It was later approved as a treatment for heavy menstrual bleeding. It works by slowly releasing a low dose of levonorgestrel (a synthetic progestin hormone) directly into the uterus. Serious adverse side effects and potentially life-threatening complications have been reported following the implantation of the device. These complications include organ perforation, migration of the IUD to outside the uterus, expulsion of the IUD, and embedment in the uterus, among others.