After delivery, the myometrium continues to contract and this squeezes down on the placental arteries at the point where they are attached to the uterine wall, clamping them shut, thereby reducing uterine bleeding.

在分娩之后，子宫肌层持续收缩，并将胎盘动脉挤压到子宫壁上，使动脉被生理性结扎，从而减少子宫的出血。