The Real Risks of Vaping While Pregnant Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice 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 Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London