Vaping While Pregnant? Duke Study Reveals Dangers to Fetal Growth and Development in Mouse Model Duke Health 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, E Cigarettes and Pregnancy Maternal Infant Health CDC 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, Light smoking' before pregnancy can cause major health problems