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, Exposure to Thirdhand Smoke Harms the Health of Pregnant Women Thirdhand Smoke Resource Center Is vaping safer than smoking when you're pregnant? Experts weigh in BabyCenter