According to the American Lung Association,smoking during pregnancy accounts for an estimated 20 to 30 percent of low birthweight babies,up to 14 percent of premature deliveries,and about 10 percent of all infant deaths.

• 根据美国肺器官协会的说法，估计有20%25至30%25的体重不足的婴儿，多达14%25的早产以及约10%25的婴儿死亡都是由于女性在孕期吸烟引起的。