Stem Cell Research and Regenerative Medicine

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 Embryonic stem cells are pluripotent stem cells that originate from cell mass in the blastocyst, an early stage of pre-implantation embryos. Human embryos reach the blastocyst stage 4-5 days after fertilization, at which time they consist of 50-150 cells. Embryonic stem cells (ESCs) are stem cells that originate from undifferentiated mass cells in the human embryo. Embryonic stem cells are pluripotent, meaning they can grow (ie differentiate) into all derivatives of three primary seed layers: ectoderm, endoderm, and mesoderm. These are potentially compound stem cells (ploo-RIP-uh-complete), which means they can divide into more stem cells or can become all types of cells in the body. This flexibility allows embryonic stem cells to be used to regenerate or repair diseased tissues and organs. Embryonic stem cells used in today's research come from unused embryos. This results from in vitro fertilization procedures. They are donated to science. These embryonic stem cells are potentially compound.    

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