Cleavage Stage, Ovum
Synonyms
Cleavage Stages, Ovum
Ovum Cleavage Stage
Ovum Cleavage Stages
Ovum Segmentation Stage
Ovum Segmentation Stages
Segmentation Stage, Ovum
Segmentation Stages, Ovum
The earliest developmental stage of a fertilized ovum (ZYGOTE) during which there are several mitotic divisions within the ZONA PELLUCIDA. Each cleavage or segmentation yields two BLASTOMERES of about half size of the parent cell. This cleavage stage generally covers the period up to 16-cell MORULA.
See Also