Can you vape while pregnant? Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London 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 Study uncovers the hidden dangers of secondhand vape exposure to children Vaping & Pregnancy Vape Smoke Free