title: Umbilical artery waveforms analysis in normal and intrauterine growth-retarded fetuses: a comparison between the pulsatility index (PI) and the relative flow index (R).
authors.forename: J H
authors.initials: JH
authors.lastname: Hung
authors.forename: H T
authors.initials: HT
authors.lastname: Ng
authors.forename: L P
authors.initials: LP
authors.lastname: Shu
authors.forename: Y P
authors.initials: YP
authors.lastname: Pan
mesh_terms: D001783:Blood Flow Velocity; D005260:Female; D005317:Fetal Growth Retardation / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D011237:Predictive Value of Tests; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011673:Pulsatile Flow; D012016:Reference Values; D014463:Ultrasonography; D014469:Umbilical Arteries / Q000502:physiology / Q000503:physiopathology*; D014655:Vascular Resistance