Is vaping safer than smoking when you're pregnant? Experts weigh in BabyCenter 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, Tobacco and Pregnancy One Pager V2 Smoking during pregnancy March of Dimes Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals