Viewing many commercials on television and ads on what harm can come to you from smoking, you would not want your baby to come into ANY contact with the very same fatal chemicals from this smoking. Cigarettes include many chemicals such as tar, acetone, alcohol, and rat poison that is already proven to damage your own body. Even simple chemicals such as caffeine and menthol can really hurt your baby during pregnancy. Smoking cigarettes can effect your baby's oxygen consumption. The baby's lungs can also be effected by the chemicals that enter through the mother's mouth. Side effects such as Cleft Lip and Palate are big effects that come from smoking during a pregnancy.