In the United States, about 8% of all women who are pregnant smoke cigarettes, and another roughly 4% report using electronic cigarettes or vapes. To learn more about the dangers of smoking 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 Smoking during your partner's pregnancy Raising Children Network How secondhand smoke, thirdhand smoke & vaping affects kids Vaping before, during and after pregnancy: leaflets and infographics ASH E Cigarette Use During Pregnancy & Breastfeeding FAQs HealthyChildren.org