In this video you can see 2 uniform pronuclei as the result of proper process of fertilization.
In the cleavage phase of embryonic development the embryo is divided evenly into 2, 4, and 8 cells having good morphokinetic parameters - it is divided from 2 to 4 in more or less the same time and even into 8 cells relatively at once.
By the end of the video you can observe the compaction into the morula and then the formation of a blastocyst with a clearly visible embryoblast (inner cell mass) and a quality trophectoderm.
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