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.

测骨盆倾斜度外测值,为产前检查估计难产风险指提供据。

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

导致头位难产的主要次为胎头位置异、巨大儿、宫缩乏力、软产道及骨产道异。