结果：发现羊水镜诊断率高达90%，同时可了解胎先露及胎膜早破情况。
Results: It showed that the diagnostic rate could reach more than 90%.
方法选择单胎枕先露、无严重并发症及合并症的孕妇200例，随机分为观察组和对照组，每组各100例。
Methods 200 cases pregnant women of single birth, occipital presentation and without complication were randomly divided into overview group and control group, and each group had 100 cases.
方法选择单胎枕先露、无严重并发症及合并症的孕妇200例，随机分为观察组和对照组，每组各100例。
Methods 200 cases pregnant women of single birth, occipital presentation and without complication were randomly divided into overview group and control group, and each group had 100 cases.
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