Methods: Fifteen female SD rats according to their month age were divided into three groups, immature group(IMG),matured group(MG) and climacteric group(CMG). Oviducts attained from the rats were embedded by paraffin and then sectioned.

• 方法 :各以 5只 1月龄、8月龄和 18月龄SD雌性大鼠分别作为性成熟前期组 (IMG)、性成熟期组 (MG)和更年期组 (CMG)。