Perinatal mortality rate in 11 Jiangsu cities.
D002681:China; D036861:Delivery, Obstetric / Q000379:methods; D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D011247:Pregnancy; D011446:Prospective Studies