脐带绕颈是胎儿宫内窘迫和新生儿窒息的常见原因之一。脐带过长、胎儿在子宫内活动度过大可能是造成绕颈的基本原因,体外倒转术也可造成人为的脐绕颈。在临床实践中,超声诊断脐带绕颈与临床评估间存在一定差异,为了解超声对脐绕颈的准确性,本研究对200例晚期妊娠孕妇进行了观察 Umbilical cord around the neck is one of the common causes of fetal distress and neonatal asphyxia. Umbilical cord is too long, fetal activity in the womb is too large may be caused by the basic reason around the neck, in vitro inversion surgery can also cause artificial umbilical around the neck. In clinical practice, ultrasound diagnosis of umbilical cord around the neck and clinical assessment there are some differences between, in order to understand the ultrasound on the umbilical cord around the neck accuracy, the study of 200 cases of late pregnancy pregnant women were observed