Other terms
Blastocysts,Embryo, Preimplantation,Embryos, Preimplantation,Preimplantation Embryo,Preimplantation Embryos
Description
Blastocyst: A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The inner cell mass gives rise to the embryonic disc and eventual embryo proper.
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