宫缩

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

产后出血、宫缩乏力和盘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.

导致头位难产的主要次为头位、巨大儿、宫缩乏力、软产道及骨产道。