The degenerated oocytes are usually characterized by cell cycle arrest, meiotic disruption and abnormal gene expression.Epigenetic modification is also markedly changed.

• 退化的卵母细胞通常表现为细胞周期阻滞、减数分裂紊乱以及一些基因的表达异常，表观遗传修饰在此过程中亦发生了显著改变。