Methods Immunohistochemical technology and stereological method were used to observe and measure UB and nephron at different developmental stages of embryonic and postnatal mice.

• 方法 应用免疫组织化学技术结合体视学方法，对不同胚（日）龄小鼠输尿管芽发育及肾单位数目进行系统观察和定量分析。