The atretic follicles are found at the different stages of the development of the ovary.

• 结果显示卵巢分叶呈条索状，卵泡发育中没有出现卵泡腔，卵泡细胞始终为单层，卵泡膜随卵泡发育成熟由单层转变为多层，闭锁卵泡在卵泡发育的各个不同时期都有出现。