E Cigarettes and Pregnancy Maternal Infant Health CDC Vaping more effective than patches for pregnant women, study finds Dr Colin Mendelsohn Vaping During Pregnancy: Are e Cigarettes Safe for Baby? Health Effects of Maternal Exposure to Thirdhand Chemical Residue from Vape Aerosols Persist Long After Infancy Thirdhand Smoke Resource Center Second hand smoke is highly toxic. Here's what happens when pregnant women and their babies are exposed to second hand smoke.