Premature rupture of the membrane is a common problem with smoking women. The baby born is premature and may have underdeveloped brain and physique.Ã Moreover the smoking women also face difficulty in conceiving a child.Heart disease, emphysema, stroke, lung cancers are some of the major diseases which affects a child when a woman is smoking during pregnancy. A child when exposed to smoking may suffer from disease like bronchitis, pneumonia, asthma and ear infection. It causes immediate effect on the baby because part of the oxygen in your blood is immediately replaced with carbon monoxide. It causes both mother and baby blood vessels to narrow, reducing the flow of blood. heart rate of both mother and baby will increase.