Does Vaping Cause Secondhand Smoke? 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 Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC How secondhand smoke, thirdhand smoke & vaping affects kids Vaping before, during and after pregnancy: leaflets and infographics ASH