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 Light smoking' before pregnancy can cause major health problems Dangers of Smoking During Pregnancy Explained by Expert Midwife Vaping more effective than patches for pregnant women, study finds Dr Colin Mendelsohn 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,