Vaping during pregnancy Tommy's 2nd Hand Vape Smoke And Pregnancy 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 A smoke free and vape free environment during and after pregnancy is essential for your baby's safety. Learn more at SNHD.INFO SUID. Tobacco smoking and vaping in pregnancy and neonatal outcomes: results from a UK cohort study