Embryonic death and the creation of human embryonic stem cells
J. Clin. Invest. Donald W. Landry, et al. 114:1184 doi:10.1172/JCI23065 [Go to this article.]

Figure 1
Human embryonic stem cells. The steps from fertilized egg obtained by IVF to embryonic stem cells are depicted. A few-celled embryo gives rise to the blastocyst, a structure comprised of an outer cell layer, the trophectoderm, and the ICM. The ICM is harvested and plated on feeder cells, then replated (not shown) to yield a population of embryonic stem cells.