卵膜包括初级卵膜和次级卵膜。
初级卵膜源于卵母细胞，次级卵膜由晚期滤泡细胞分泌形成。
The secondary envelope may be deposited on the primary envelope surface and it is formed by the substances secreted from the granules cells.
初级卵膜源于卵母细胞，次级卵膜由晚期滤泡细胞分泌形成。
The secondary envelope may be deposited on the primary envelope surface and it is formed by the substances secreted from the granules cells.
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