In the United States, about 8% of all women who are pregnant smoke cigarettes, and another roughly 4% report using electronic cigarettes or vapes. To learn more about the dangers of smoking Vaping may be an effective way to quit smoking during pregnancy New Scientist Any form of smoking is not allowed during pregnancy, and this includes electronic cigarettes, which can cause harm to both the mother and the baby. It can affect the baby's growth and The Real Risks of Vaping While Pregnant Can you vape during pregnancy? Allen Carr's Easyway E cigarette flavor and device preferences among US pregnant women who smoke: A latent class analysis