After condoms, the Intrauterine Device or IUD is the most popular form of birth control in the world. So why do so few women know about it or use it in the U.S? This story looks at the controversial history of the device and why, despite its dark history, American women shouldn’t overlook it.

Melissa Gilliam, MD, MPH, is Professor of Obstetrics and Gynecology and Professor of Pediatrics at the University of Chicago. She is Chief of the Section of Family Planning and Contraceptive Research in the Department of Obstetrics and Gynecology, Director of the Fellowship in Family Planning and heads the Program in Pediatric and Adolescent Gynecology.