myometrium

例句：

1. 1.The doctor performed a biopsy on the patient's uterine myometrium to diagnose the condition.
   医生对患者的子宫肌层进行了活检，以诊断该病。
2. 2. During labor, the uterine myometrium stretches and contracts to facilitate delivery.
   分娩期间，子宫肌层会拉伸和收缩，以促进分娩。
3. 3. The myometrium is responsible for contracting and expanding during pregnancy to support the developing fetus.
   子宫肌层在怀孕期间负责收缩和扩张，以支持正在发育的胎儿。