This article refers to the levonorgestrel intrauterine device (LNG-IUD), which used to be called the intrauterine system (IUS). For information on the copper-containing (non-hormonal) intrauterine device see the separate Intrauterine contraceptive device article. For information on insertion techniques see the separate Intrauterine contraceptives (IUD and LNG-IUD) - management article.
This is a companion discussion topic for the original article at https://patient.info/doctor/fertility/intrauterine-system-pro