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CGP EDU Academic Team
Published on: August 21, 2026
Morula is a developmental stage:
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The haploid nucleus of the sperms and that of the ovum fuse together to form a diploid zygote. As the zygote moves through the isthmus of the oviduct towards the uterus, the mitotic division (cleavage) starts and forms 
daughter cells called blastomeres.
The embryo with 
blastomeres is called a morula. The morula continues to divide and transforms into blastocyst as it moves further to get embedded in the endometrium of the uterus. This is called implantation.
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