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 Smoking, vaping & pregnancy: in pictures Raising Children Network The Real Risks of Vaping While Pregnant Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Does Vaping Cause Secondhand Smoke?