This post was written by Megan Corbett, RN, in January 2013 and updated by Brandy Bautista in March 2024. Today, many intrauterine devices (IUDs), a form of long-acting reversible contraception (LARC), are small, T-shaped plastic rods with two arms and a string. They are inserted into the uterus to prevent pregnancy. The history of the … Continue reading A History: The IUD