Jesse E. answered • 07/13/19
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Masters in Chemistry and Bachelors in Biology
The early stages of cleavage are characterized by the number of cells. As the number or cells increase, the stages of development of the blastocyst. Each stage has its own unique physical and biological traits. For a review of these stages, please see the link in the comments section.
Jesse E.
http://www.vivo.colostate.edu/hbooks/pathphys/reprod/fert/cleavage.html07/13/19