title: Pulsed Doppler echocardiographic determination of time of ductal closure in normal newborn infants.
mesh_terms: D004373:Ductus Arteriosus / Q000502:physiology*; D004374:Ductus Arteriosus, Patent / Q000175:diagnosis / Q000453:epidemiology; D004452:Echocardiography; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male