List the early embryonic stages starting with the zygote. Report
the number of days after fertilization...
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List the early embryonic stages starting with the zygote. Reportthe number of days after fertilization each stage occurs Explainthe changes that occur in the embryo and the process ofimplantation. Explain the source and role of human chorionicgonadotropin and the source of the hormones replacing it.
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After fertilisation Sperm and ovum combine to form Zygote Zygote undergo cleavage 1 2 cell stage on Day 2 fb 4 cell stage on Day 34 of fertilisation 3 8 cell stage known as early Morula on Day 4 fb Late Morula 16 cell stage Mulberry morula same day Late morula have inner cell mass which form embryo proper and outer cell which form trophoblast cells 4 On Day 5 Blastocyst is formed where trophoblast appears Late blastocyst on Day 67 in which cavity is present Implantation
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