难产

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

导致头位的主要因素依次为胎头位置、巨大儿、宫缩乏力、软及骨。

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.

测骨盆倾斜度外测正值,为前检查估风险指数提供依据。