From the Centers for Disease Control. Trends in fertility and infant and maternal health--United States, 1980-1988.
D000293:Adolescent; D000328:Adult; D001723:Birth Rate; D005260:Female; D005298:Fertility; D006801:Humans; D015994:Incidence; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008393:Marriage / Q000208:ethnology / Q000706:statistics & numerical data; D011295:Prenatal Care / Q000706:statistics & numerical data*; D014481:United States / Q000453:epidemiology