宫缩

The major indicatio of subtotal hysterectomy were postpartum hemorrhage, uterine inertia and placental related factors.

后出血、宫缩乏和盘因素是子宫次全切术的主要手术指征。

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

位难的主要因素依次为位置异常、巨大儿、宫缩乏、软道及骨道异常。