SUA was relevant to many fetal abnormalities.A ultrasonic diagnostician should take more attention to umbilical cord vessels and SUA to give more message to clinical physicians.

• 结论：应用超声检查可以对单脐动脉做出明确诊断单脐动脉与诸多胎儿异常关系密切，超声诊断医师应当高度重视脐血管的检查及单脐动脉的诊断，以有效指导临床。