Vaping more effective than patches for pregnant women, study finds Dr Colin Mendelsohn FMD E cigarettes help pregnant smokers quit without risks to pregnancy Queen Mary University of London E cigarettes safer than nicotine patches for quitting smoking during pregnancy Pregnant parents told vaping doesn't harm unborn babies The Independent Smoking e cigarettes while pregnant could increase risk of birth defects, study suggests The Independent The Independent Changes in e cigarette and cigarette use during pregnancy and their association with small for gestational age birth ScienceDirect