E Cigarettes (Vapes) Smoking and Tobacco Use CDC Vaping and Smoking While Pregnant: Risks, Effects and More Use of Electronic Vapor Products Before, During, and After Pregnancy Among Women with a Recent Live Birth Oklahoma and Texas, 2015 MMWR 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