Tobacco and Pregnancy One Pager V2 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 more effective than patches for pregnant women, study finds Dr Colin Mendelsohn Woman's Doctor: Is vaping during pregnancy dangerous? Can you vape while pregnant?