Methods: Forming the model of mouse vaginal epithelium and scale epidermis of mouse tail, using light microscope to observe the epithelial mitosis and epidermal keratinization respectively.

• 方法：制备雌激素周期小鼠阴道上皮模型及鼠尾鳞片表皮模型，用光学显微镜观察分析基底细胞中有丝分裂数及颗粒层鳞片数。