持续性枕横位难产 persistent occipitotransverse position birth difficulty
或持续性枕横位 persistent occipito transverse position
持续性枕后位、枕横位 abnormal fetal position
·2,447,543篇论文数据，部分数据来源于NoteExpress
大多数胎头位置异常为持续性枕横位和枕后位，可以试产；
Majority fetus head position unusually is persistent occipitoposterior position and persistent occipitotransverse position, can trying the delivery;
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