Objective:To survey the normal values of pelvic inclination of external pelvimetry and to provide evidence so as to estimate dystocia risk index for antenatal care.

测量骨盆倾斜度外测量正常值,为查估计风险指提供依据。

The main causes of dystocia of vertex presentation were occiput malpresentation, macrosomic infant, uterine atony, abnormal pelvic and genital tract.

导致头位主要因素依次为胎头位置异常、巨大儿、宫缩乏力、软道及骨道异常。