The levonorgestrel intrauterine device (LNG-IUD) is a very effective method of contraception. Some types of LNG-IUD may also be used to treat heavy periods (menorrhagia) and conditions such as endometriosis. The LNG-IUD sits inside the womb (uterus).
This is a companion discussion topic for the original article at https://patient.info/sexual-health/long-acting-reversible-contraceptives-larc/intrauterine-system