E Cigarettes (Vapes) Smoking and Tobacco Use CDC Nicotine products in any form, whether from cigarettes, vaping or chewing tobacco, pass into a mother's bloodstream and through the placenta to the growing baby. Quitting nicotine is hard for many people, Vaping in pregnancy is harmful for babies and mothers: study Folio Smoking during pregnancy March of Dimes Vape residue may harm unborn babies