Blastocyst

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.