From the findings of electron microscopic research, we suppose that the metabolism in oocytes can be partly abnormal by the end of culture, which prevents the synthesis of some components (such as CGs) or migration of some organelle.

• 推测该时期有的卵母细胞部分代谢机能失调，从而导致某些合成（如CGs）障碍或某些细胞器的迁移发生障碍。