Women who vape are more likely to have low birthweight babies, study shows UCLA 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, Is vaping safer than smoking when you're pregnant? Experts weigh in BabyCenter Flyer: Vaping During and After Pregnancy Central District Health Dangers of Smoking During Pregnancy Explained by Expert Midwife