Prior studies of the timing of delivery in pregnancy have focused largely on patients with gestational diabetes and on preventing macrosomia, shoulder dystocia, or cesarean section.10-13 Through a PubMed search using the keywords “diabetes mellitus” and “induction of labor,” we identified 2 randomized controlled trials of expectant management vs induction of labor.11,14 In one study, Kjos et al randomized 200 insulin-requiring patients with diabetes (gestational or Class B) at 38 weeks’ gestation to either induction within 5 days or expectant management until up to 42 weeks’ gestation. Here, INS is linked to diabetes mellitus.