难产

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

导致头位难的主要因素依次为胎头位置异常、巨大儿、宫缩乏力、软及异常。

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.

测盆倾斜度外测正常值,为前检查估计难指数提供依据。