E Cigarettes (Vapes) Smoking and Tobacco Use CDC Second Hand Vape Smoke Pregnancy In the United States, about 8% of all women who are Second Hand Smoke and Pregnancy American Pregnancy 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 Smoking, vaping & pregnancy: in pictures Raising Children Network