pathological retraction ring of uterus

例句：

1. 1.The pathological retraction ring of the uterus is a common cause of miscarriage.
   病理性子宫收缩环是导致流产的常见原因。
2. 2.During labor, the pathological retraction ring of the uterus can cause severe pain.
   在分娩过程中，病理性子宫收缩环可能导致剧烈疼痛。
3. 3. The pathological retraction ring of the uterus can be treated with medication to relieve symptoms.
   病理性子宫收缩环可以通过药物治疗来缓解症状。