IN A TAUPE-WALLED exam room at the Women’s Community Clinic in San Francisco, lead clinician Lisa Mihaly plucks a small laminated card from a cabinet. Tethered to the card are three T-shaped IUDs, or intrauterine devices—forms of birth control that are, as the name implies, inserted into a woman’s uterus to prevent pregnancy for up to 12 years. Mihaly points to each device like friends in a group photo: Paragard, with its thin bands of copper coiled around a white plastic trunk and two arms at attention; Mirena, the first hormonal IUD available in the US; and Skyla, an IUD designed for women who have never had children. But there’s one option missing, Mihaly says: a newer model called Liletta.