Age of mother and pregnancy outcome in the 1981 Arkansas birth cohort.
D000293:Adolescent; D000328:Adult; D001131:Arkansas; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008423:Maternal Age; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D011295:Prenatal Care; D044469:Racial Groups; D012959:Socioeconomic Factors