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 4 myths about vaping and pregnancy busted Your Pregnancy Matters UT Southwestern Medical Center Protecting Little Lungs: Unveiling the Harsh Reality of Vape Smoking During Pregnancy" Vaping exposes the developing fetus to harmful chemicals, including nicotine potentially leading to low birth weight, preterm birth, or developmental New vaping warning issued for pregnant women Netmums Health Effects of Maternal Exposure to Thirdhand Chemical Residue from Vape Aerosols Persist Long After Infancy Thirdhand Smoke Resource Center