Obisesan OH, Osei AD, Uddin SMI, et al. - In view of a drastic increase in the prevalence of e-cigarette use in the last decade in the US, researchers sought to determine their prevalence, patterns of use, and associated risk factor in pregnant women, as this could have potential health implications for the mother and the developing child. They studied adult women of reproductive age (18–49 years) who reported being pregnant ( n = 7,434) using Behavioral Risk Factor Surveillance System Survey data from 2016 to 2018. Among these, current e-cigarette use was reported in nearly 2.2%, of whom 0.6% reported daily use. A higher prevalence of other tobacco product use, marijuana use, heavy alcohol intake, binge drinking, and other high-risk behaviors were reported among pregnant current e-cigarette users vs pregnant never e-cigarette users. These findings emphasize reinforcing prevention and policy efforts, particularly in the vulnerable subgroup of pregnant women.