Antenatal detection of single umbilical artery: what does it mean?

Authors

  • Vânia Ferreira U. diagnóstico Pré-Natal, S. Obstetrícia, Maternidade Júlio Dinis, CH Porto
  • Inês Vaz Obstetric Service of Maternidade Júlio Dinis of Centro Hospitalar do Porto
  • Ana Paula Reis Obstetric Service of Maternidade Júlio Dinis of Centro Hospitalar do Porto
  • Maria José Mendes Obstetric Service of Maternidade Júlio Dinis of Centro Hospitalar do Porto
  • Maria do Céu Rodrigues Obstetric Service of Maternidade Júlio Dinis of Centro Hospitalar do Porto

DOI:

https://doi.org/10.25753/BirthGrowthMJ.v22.i3.10284

Keywords:

Congenital malformation, prenatal diagnosis, single umbilical artery, ultrasonography

Abstract

Introduction: The presence of a single umbilical artery (SUA) is recognised as a soft marker for congenital anomalies, aneuploidy, earlier delivery and intra-uterine growth restriction and/or low birth weight. The aim of this study was to assess the incidence of SUA in a selected population. And secondly, to examine the clinical signiÞ cance of this soft marker.

Material and methods: A retrospective analysis, over a 36-month period, of all cases of pregnancy interruption due to medical causes, up to 16 weeks of gestation, with prenatal diagnosis of SUA; cases of live born with a prenatal diagnosis of SUA or after delivery, at the routine examination of the placenta. Fetal growth and the risk of preterm labor are also to consider in the surveillance of these pregnancies.

Results: Thirty nine cases of SUA were identiÞ ed during the study period. Incidence of SUA in live born was 0.32% (n=30) and in pregnancy interruption due to medical causes was 12.9% (n=9). The antenatal detection rate was 77%. This ecographic soft marker was an isolated Þ nding in 27 live born (90%). In live born with SUA and associated malformations (13.3%), urinary abnormalities were identiÞ ed in three cases (75%), and a skeletal with esophageal malformation was identiÞ ed in one case (25%). Preterm birth occurred in seven cases (23.3%) and birth weight below 10th percentile in four cases (13.3%).

Discussion and conclusions: The presence of SUA in antenatal period should alert the sonographer and clinician for the need of a detailed examination of the fetus to exclude other anomalies. Fetal growth and the risk of preterm labor are also to consider in the surveillance of these pregnancies.

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Published

2017-01-16

How to Cite

1.
Ferreira V, Vaz I, Reis AP, Mendes MJ, Rodrigues M do C. Antenatal detection of single umbilical artery: what does it mean?. REVNEC [Internet]. 2017Jan.16 [cited 2025Jan.30];22(3):140-4. Available from: https://revistas.rcaap.pt/nascercrescer/article/view/10284

Issue

Vol. 22 No. 3 (2013)

Section

Original Articles

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