American children suffer far more from low birth weight (a major danger signal for later life); being overweight at ages 11, 13, and 15; and very high rates of teenage fertility. There are around 35 births for every 1,000 girls aged 15-19, compared to fewer than ten per thousand in the northern European countries.
美国孩子的出生重量显著较轻（这是日后生活的主要危险信号之一）；而在11、13和15年龄段超重；十几岁青少年产子率极高。每1000名15—19年龄段女孩会生下35个左右的婴儿，而北欧国家的这一比例不到千分之十。