发生于头先露的难产称头位难产。而胎头位置异常,经过试产仍不能转为正常位置者几乎均将成为难产,自然分娩的机会极少。纠正胎头位置异常是预防头位难产最主要的措施。适时采用手法旋转,可缩短产程,减少产妇痛苦,降低剖宫产率。本文对持续性枕横位及持续性枕后位的产妇在不同时 Occurred in the first revealed the first dystocia dystocia. The abnormal fetal head position, after trial can not be transferred to normal position almost all will be difficult to deliver, natural childbirth opportunities rarely. Correct fetal head position anomalies are the most important measures to prevent head dystocia. Timely rotation by hand can shorten the labor process, reduce maternal pain and reduce the rate of cesarean section. This article for persistent occipital and persistent posterior position of maternal at different times