Cells derived from the BLASTOCYST INNER CELL MASS which forms before implantation in the uterine wall. They retain the ability to divide, proliferate and provide progenitor cells that can differentiate into specialized cells.

Synonyms: Stem Cells, Embryonic, Cells, Embryonic Stem, Stem Cell, Embryonic, Cell, Embryonic Stem, Embryonic Stem Cells, Embryonic Stem Cell