SA Health Smoking and vaping during pregnancy can be harmful to your unborn baby. The chemicals in cigarettes and vapes can damage your baby's Instagram Vape Residue May Harm Unborn Babies' Immune Systems Respiratory Therapy Vaping before, during and after pregnancy: leaflets and infographics ASH 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,