Are vapes and nicotine patches safe to use in pregnancy? Tommy's Did you know? Smoking or vaping during pregnancy can harm both mom and baby. Increases risk of premature birth Raises chances of low birth weight Can affect brain Smoking, vaping & pregnancy: in pictures Raising Children Network Study finds vaping in pregnancy harms both mothers and babies Vaping before, during and after pregnancy: leaflets and infographics ASH Can You Vape Or Smoke While Pregnant Vaping while pregnant is safe for both babies and mothers, rule experts amid growing fears of dangers of e cigs