Study finds vaping in pregnancy harms both mothers and babies Vaping may seem safer than smoking, but it's not risk freeespecially for your baby. Nicotine, heavy metals, and other toxic chemicals in e cigarettes can affect fetal growth, brain development, and long term health. Even Women who vape are more likely to have low birthweight babies, study shows UCLA Vaping before, during and after pregnancy: leaflets and infographics ASH