Maternal smoking has become the most preventable cause of fetal loss and preterm delivery in the United States. In addition, maternal smoking has been associated with postnatal morbidity and mortality from respiratory infections and sudden infant death syndrome.1Approximately 30% of women who are pregnant and smoke quit at some point in their pregnancy, but postpartum relapse rates in the ensuing 6–12 months average 60–80%.2 In our studies as well as others, the major predictors of continued smoking during pregnancy are daily consumption of cigarettes, low socioeconomic status, and the presence of other smokers in the home.3 Similarly, the major predictors of postnatal relapse are socioeconomic status and other …