Iowa perinatal mortality selected maternal risk characteristics--1974-1978.
D000293:Adolescent; D000328:Adult; D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007484:Iowa; D008423:Maternal Age; D011247:Pregnancy; D012306:Risk