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Objective\ To observe clinical effect of manual correcting persistent occipitoposterior position during active stage.
目的观察活跃期施行徒手矫正持续性枕后位的临床效果。
Majority fetus head position unusually is persistent occipitoposterior position and persistent occipitotransverse position, can trying the delivery;
大多数胎头位置异常为持续性枕横位和枕后位，可以试产；
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