Teenage maternal mortality in Chicago 1956-1968.
D000293:Adolescent; D000328:Adult; D002641:Chicago; D005260:Female; D006801:Humans; D008428:Maternal Mortality; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology* / Q000517:prevention & control; D011295:Prenatal Care; D012189:Retrospective Studies