Birth weight, fetal age and perinatal mortality.
D001724:Birth Weight; D002170:Canada; D004739:England; D005260:Female; D005313:Fetal Death / Q000453:epidemiology; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D009519:New York City; D011247:Pregnancy; D044469:Racial Groups