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The difference between totipotent and pluripotent cells is only that totipotent cells can give rise to both the placenta and the embryo. As the embryo grows these pluripotent cells develop into specialized, multipotent stem cells. Totipotent cells can form all the cell types in a body, plus the extraembryonic, or placental, cells. Embryonic cells within the first couple of cell divisions after fertilization are the only cells that are totipotent. Pluripotent cells can give rise to all of the cell types that make up the body; embryonic stem cells are considered pluripotent. Multipotent cells can develop into more than one cell type, but are more limited than pluripotent cells; adult stem cells and cord blood stem cells are considered multipotent.