What are the dangers of cigarette smoking during pregnancy? Nobody has ever said that cigarettes can be good for you, and for good reason. Apart from increasing the risk of fatal diseases like cancer and heart disease, cigarette smoking poses many dangers for pregnant women. This danger is alleivated multifold because of the precious life evolving in the mother’s womb. Cigarettes contain tobacco, lead, cyanide, and a thousand other toxic materials that make it harmful. In pregnancy, it can lead to serious complications like miscarriage, stillbirth, internal bleeding, bodily defects, and even infant death. It also constricts the blood vessels of the mother, putting her life to risk as well. It is also a misconception that e-cigarettes and other nicotine substitutes are safe. They all have the same harmful effect. Pregnant mothers are recommended to absolutely stay away from this fatal habit, or at least quit cigarette smoking during pregnancy.