Research continues to show just how important it is for pregnant women to eat a healthy diet and live a healthy lifestyle. An article in the journal "Brain Research" states: Nutritionally deprived newborns and fetuses have less neurons in the region of the brain that controls food intake. Because of the lack of neurons these babies are programmed for overeating at the stem cell even before birth. This need to overeat, which is do to a physical problem, can continue into adulthood and cause obesity.