持续性枕后位 (ＰＯＰＰ)是较常见的异常胎头方位 ,在头位难产中居首位[1] 。其相关影响因素的研究多限于骨盆类型、头盆关系、产力等方面。我们应用Ｂ超扫描多指标综合判断胎儿方位的方法 ,监测了产程早期 185例枕先露的枕方位、脊方位等 ,探讨了枕后位及其脊方位与ＰＯＰＰ的 Persistent posterior position (POPP) is the most common abnormal fetal head orientation, the first bit in the first dystocia [1]. Its related factors are mostly limited to the study of pelvic type, head basin relationship, productivity and so on. We use B-scan multi-index comprehensive evaluation of fetal position method to monitor the early labor of 185 cases of occipito-first pillow exposed azimuth, ridge orientation, explore the posterior position and its ridge orientation and POPP