From the 2006 Holiday Lectures — Potent Biology: Stem Cells, Cloning, and Regeneration

Creating Embryonic Stem Cell Lines

The inner cell mass (ICM) cells of blastocyst-stage early human embryos can be removed and cultured. These cells can be grown in the lab indefinitely. Various growth factors cause these cells to develop into a variety of differentiated cells, such as muscle or nerve cells.

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