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 Does Vaping Cause Secondhand Smoke? 4 myths about vaping and pregnancy busted Your Pregnancy Matters UT Southwestern Medical Center