方法对产前行常规B超或彩超检查，疑有胎儿脐带绕颈的180例30～ 41周孕妇的超声检查结果与分娩结果进行对比分析。
Methods We compared the ultrasonic results of 180 cases who have been pregnant for 30 to 41 weeks and were suspected to have UCAN by B-US or CD-US to the results of delivery.
所有患者均于术前行彩超检查，术后1周、1个月、3个月、6个月进行彩超复查及专科体检。
All patients were on preoperative ultrasonography, after 1 week, 1 month, 3 months, 6 months and specialist review of medical ultrasound.
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