Vaping and Smoking While Pregnant: Risks, Effects and More Avoid Impairment Safe Sleep Academy 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 Vape residue may harm unborn babies, mouse study suggests Use of Electronic Vapor Products Before, During, and After Pregnancy Among Women with a Recent Live Birth Oklahoma and Texas, 2015 MMWR Second Hand Smoke and Pregnancy American Pregnancy Association