Methods 288 cases of full term pregnant women were examined by CDFI two weeks ahead of parturition, the findings of umbilical cord around the neck or not were analyaed and compared with the results of the clinical diagnosis after delivery.

• 方法对288例足月妊娠妇产前2周内行彩色多普勒超声检查，观察胎儿脐带绕颈情况与产后结果对照分析。