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Single umbilical artery: prenatal findings.

U J Herrmann¹, D Sidiropoulos

¹Department of Obstetrics and Gynecology, University of Bern, Switzerland.

Prenatal Diagnosis

|May 1, 1988

Summary

A single umbilical artery in high-risk pregnancies may indicate fetal growth retardation or malformations. Further investigation is crucial when this finding is detected during prenatal ultrasound.

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Area of Science:

Perinatology
Fetal Medicine
Medical Imaging

Background:

Pregnancy complications like fetal malformation and intrauterine growth retardation (IUGR) require careful monitoring.
Sonographic evaluation of the umbilical cord is a key diagnostic tool in high-risk pregnancies.

Purpose of the Study:

To investigate the prevalence and significance of a single umbilical artery (SUA) in high-risk pregnancies.
To assess the correlation between SUA and adverse fetal outcomes such as malformations and IUGR.

Main Methods:

Sonographic examination of the umbilical cord in 450 high-risk pregnancies.
Documentation of SUA diagnosis, gestational age at detection, and follow-up outcomes.

Main Results:

A single umbilical artery was diagnosed in 4 fetuses and suspected in 2 others (total 6/450).
Three cases of SUA were missed during sonography.
All seven surviving fetuses with SUA exhibited growth retardation, and four presented with severe malformations.

Conclusions:

The presence of a single umbilical artery in prenatal sonography necessitates further evaluation.
Associated anomalies, intrauterine growth retardation, and chromosomal abnormalities should be ruled out when SUA is identified.

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