The first few specialized divisions of an activated animal egg; Stage consisting of division of cells in the early embryo. The zygotes of many species undergo rapid cell cycles with no significant growth, producing a cluster of cells the same size as the original zygote. The different cells derived from cleavage are called blastomeres and form a compact mass called the morula. Cleavage ends with the formation of the blastula. [ http://en.wikipedia.org/wiki/Cleavage_(embryo) http://amigo.geneontology.org/amigo/term/GO:0040016 ]

This is just here as a test because I lose it

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efo_slim

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UBERON:0000107