The folds was tall,which looked like leaf-shaped,tubular glands of lamina propria were developed,blood vessel and nerve were abundant in the uterus part of the oviduct;

• 低产组乌鸡卵巢内初级卵泡数量较多,次级卵泡量少,卵泡外腺细胞数量较多,输卵管子宫部皱襞较短,血管少。