On the other hand, if duration of IVM is too long, it would lead to oocyte degradation and the phenomenon such us low cleavagerate and so on.
而培养时间过长则可能导致卵母细胞退化，同样也会引起卵裂率较低等现象。
2
There was no significant difference in fertility rate, cleavagerate, high-quality embryonic rate and graftage embryonic number between these groups(P>0.05).
各组间受精率、卵裂率、优质胚胎率、移植胚胎数比较差异均无显著性（P>0.05）。
3
The results indicated that there were no notable difference between granulosa cell monolayers group and cumulus cell monolayers group for the cleavage, blastocyst and hatched rate (P>0.05).