title: The impact of different sides of the absent umbilical artery on fetal growth in an isolated single umbilical artery.
abstract: OBJECTIVE
  The aim of this study was to determine whether laterality of an absent umbilical artery (AUA) is associated with fetal growth in fetuses with isolated single umbilical artery (SUA).
  
  
  METHODS
  Fifty singleton pregnancies were studied, including 26 cases with a right AUA and 24 cases with a left AUA in isolated SUA, and 200 singleton pregnancies with a three-vessel cord. Delivery data, including gestational age and birth weight and height, were recorded. Compare the birth weight and height in fetuses between the different sides of an AUA and the three-vessel cord by covariance analysis.
  
  
  RESULTS
  The mean difference was 0.25 kg (SD 0.05; P < 0.05) in birth weight between fetuses with a left AUA and a three-vessel cord. The mean difference was 1.03 cm (SD 0.56; P < 0.05) in birth height between fetuses with a left AUA and a three-vessel cord. No significant differences were observed in birth weight and height between fetuses with a right AUA and those with a three-vessel cord.
  
  
  CONCLUSIONS
  Our data suggest that the birth weight and height of fetuses with a left AUA in isolated SUA are lower than those with a three-vessel cord.
authors.affiliation: Department of Ultrasound, West China Second University Hospital, Chengdu, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Jiang
authors.forename: X H
authors.initials: XH
authors.lastname: Li
authors.forename: T Z
authors.initials: TZ
authors.lastname: Yang
mesh_terms: D000328:Adult; D001724:Birth Weight; D005260:Female; D047109:Fetal Development; D005317:Fetal Growth Retardation / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D012189:Retrospective Studies; D014469:Umbilical Arteries / Q000002:abnormalities*