Smoking in pregnancy is a risk factor for a common form of childhood epilepsy Any form of smoking is not allowed during pregnancy, and this includes electronic cigarettes, which can cause harm to both the mother and the baby. It can affect the baby's growth and Nicotine (Tobacco Products and E Cigarettes) Use While Pregnant and Breastfeeding StoryMD Note the SWITCHEROO tactic. First they lie by saying it's a "myth" that e cigarettes are LESS HARMFUL THAN SMOKING during pregnancy (recent studies found #vaping IS less harmful than smoking during pregnancy.)