Ultrasonography and perinatal mortality rates.
Cahill
D J
DJ
D000013:Congenital Abnormalities / Q000175:diagnosis; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D011247:Pregnancy; D016216:Ultrasonography, Prenatal