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 Vaping and Pregnancy: Are E Cigarettes Really Any Safer for You and Your Baby? E Cigarettes and Pregnancy Maternal Infant Health CDC Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice