图 1. 月经周期内雌孕激素水平变化示意图和异常子宫出血大鼠模型制备流程图
注：图中曲线为正常人体月经周期中雌激素和孕激素水平的变化。图中流程为制备异常子宫出血大鼠模型的方案。

Figure 1. Schematic diagram of estrogen and progesterone level fluctuations during the menstrual cycle and flowchart of the preparation process for a rat model of abnormal uterine bleeding
Note： Curves in the figure represent the changes in estrogen and progesterone levels during the normal human menstrual cycle. The process in the figure illustrates the protocol for preparing a rat model of abnormal uterine bleeding.