In secondhand vape, scientists smell risk American Heart Association 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 A smoke free and vape free environment during and after pregnancy is essential for your baby's safety. Learn more at SNHD.INFO SUID. E Cigarettes (Vapes) Smoking and Tobacco Use CDC Vape residue may harm unborn babies, mouse study suggests