Method: use morphological method to dissect and observe the colon of congenital malformation fetus, make-up the paraffin sections and observe the histological structures under the light-microscope.

• 方法：应用形态学方法，对先天性畸形胎儿结肠进行解剖、观察，并制成组织切片，在光学显微镜下观察其组织学结构。