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| Blastocyst Embryo, Preimplantation | Blastocysts | Embryos, Preimplantation | Preimplantation Embryo | Preimplantation Embryos Early preimplantation mammalian EMBRYO in the post-MORULA stage. Its structure consists of a TROPHOBLASTS-enclosed fluid-filled cavity with an inner cell mass. After EMBRYO IMPLANTATION, the inner cell mass of the blastocyst becomes the embryonic disc of the developing embryo. |