A 25-year-old woman, gravida 3 para 2 at 12 weeks of gestation, with two prior cesarean deliveries, presents for prenatal care. She is in treatment for opioid use disorder on extended-release naltrexone injection, with a history of opioid overdose, relapse, and poor treatment adherence on methadone and buprenorphine. She asks, "Is it safe for my baby if I continue on this medication? How will you manage my postoperative pain?"copy 2018 by the American College of Obstetricians and Gynecologists. Published by Wolters Kluwer Health, Inc. All rights reserved.