Nicotine products in any form, whether from cigarettes, vaping or chewing tobacco, pass into a mother's bloodstream and through the placenta to the growing baby. Quitting nicotine is hard for many people, New study shows common vape ingredients deform fetal mouse skulls. Even if they are nicotine free. Researchers at The Ohio State University, led by anatomist James Cray, exposed pregnant mice to the base England paying pregnant smokers to switch to e cigs while evidence of damage to developing fetuses grows Stanton Glantz blog Research on vaping during pregnancy limited as midwives call for answers and involvement in studies ABC News Smoking, vaping & pregnancy: in pictures Raising Children Network