Background:
The umbilical cord normally consists of two arteries and one vein. Single umbilical artery (SUA) is a condition in which the cord contains only one artery. SUA may be isolated or associated with congenital anomalies. This anatomic variation can be detected by ultrasound evaluation in approximately 0.5% of pregnancies. The incidence of adverse outcomes primarily depends on whether SUA is an isolated finding or associated with fetal abnormalities and aneuploidy. The aim of this study was to investigate fetal and maternal outcomes of isolated SUA.