A) When women smoke during pregnancy, the chemicals in cigarettes can reduce the amount of oxygen that the baby receives through the placenta. This reduced oxygen supply can cause the baby to grow more slowly, resulting in a lower birth weight. Additionally, smoking during pregnancy can also interfere with the development of the baby's lungs and can increase the risk of preterm delivery. All of these factors can contribute to a lower than average birth weight for babies born to smokers.
B) 1. Eat a balanced and nutritious diet.
2. Stay active, but listen to your body.