The growth of a zygote into a morula is called fragmentation.
受精卵发育成桑椹胚的过程叫卵裂。Daughter nuclei moved towards the egg surface in the form of cometic energids to form blastoderm during the cleavage.
卵裂时子核以“彗星”状活质体向卵表面迁移，形成胚盘；The fertility rates, cleavage rates, hight quality embryo rates and pregnancy rates were compared between the two groups.
比较两组的正常受精率、卵裂率、优质胚胎率及妊娠率。During the early cleavages, CVH protein was restrictively localized in the basal portion of the cleavage furrow.
在早期的分裂，CVH蛋白质被严格的限制在卵裂沟的基部。In mammals, the fertilized egg or zygote undergoes cleavage (cell division without cell growth) to form a hollow ball or blastocyst.
在哺乳动物中，卵与精子结合而成受精卵，受精卵发生数次细胞分裂（卵裂）后，形成一个中空球形的囊胚。Objective: To investigate the incidence of fertilization, cleavage and pregnancy in IVF - ET .
目的：探讨体外受精—胚胎移植（IVF-ET）的受精、卵裂及妊娠情况。The blastomere size and the cleavage speed became different distinctly at the late cleavage.
卵裂后期，卵裂球的大小和卵裂速度均出现差异。the eggs are collected before they divide and are injected with the foreign genetic material.
将这些卵收集起来，在其卵裂前注入外来基因物质。Oocytes with more than 8 layers cumulus cells had lower rate of maturation and cleavage.
具有8层以上卵丘细胞的卵母细胞的成熟率和卵裂率比较低；