Smoking, vaping & pregnancy: in pictures Raising Children Network 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, Smoking, vaping & pregnancy: in pictures Raising Children Network Smoking and vaping during pregnancy increase the risk of preterm birth support is available to help you quit. Smoking during pregnancy is the biggest modifiable risk factor for preterm birth. Quitting Women who vape are more likely to have low birthweight babies, study shows UCLA Smoking, vaping & pregnancy: in pictures Raising Children Network