[Pilot study on the risk approach to perinatal surveillance in Shunyi County, Beijing].
D002681:China; D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008430:Maternal-Child Health Centers; D010865:Pilot Projects; D011181:Postnatal Care; D011247:Pregnancy; D011295:Prenatal Care; D012306:Risk; D012424:Rural Population