Twinning and associated stillbirth in Sweden, 1871-1960.
D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D012424:Rural Population; D013548:Sweden; D014427:Twins; D014505:Urban Population