单脐动脉(SUA)与多种先天性畸形的发生率升高有关，特别是先天性心脏病，曾被认为是转诊胎儿超声心动图的指标。然而，不合并有心外畸形的单纯单脐动脉（iSUA）是否应该转诊胎儿超声心动图，目前仍存在争议。文章总结了SUA与先天畸形的关系，概括了近年来关于iSUA是否应转诊胎儿超声心动图的观点，分析了国内外超声心动图的转诊现状与研究进展，为iSUA是否应作为胎儿转诊超声心动图的指标提供参考。

Single umbilical artery (SUA) is relevant to the increasing incidence of various congenital malformations, especially the congenital heart disease, and has been regarded as an indication for referring to fetal echocardiography. However, whether isolated single umbilical artery (iSUA) without extracardiac abnormalities should be referred to fetal echocardiography is still controversial. This paper reviewed the correlation between SUA and congenital malformation, summarized recent perspectives about whether iSUA should be referred to fetal echocardiography, analyzed current status and research advances of referral of fetal echocardiography at home and abroad, and provided a reference for whether isolated iSUA should be an indication for referring to fetal echocardiography.