Answer to Question 1
10,000
Answer to Question 2
Cigarette smoke contains many harmful ingredients, many of which are carcinogens. Nicotine and carbon monoxide, both carcinogens, pass through the placenta and reach the fetus. Carbon monoxide is toxic. It decreases the amount of oxygen available to the fetus. Oxygen deprivation, in turn, is connected with impaired motor development, academic delays, learning disabilities, mental retardation, and hyperactivity. The baby is likely to be smaller if the mother smokes, and babies are more likely to be stillborn or die soon after birth if the mother smokes.