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Cells from the human placentas and human bone marrow. (A) Cells from the human term placenta. (B) Cells from the first-trimester placenta. (C) Mesenchymal stem cells(MSC) from the human bone marrow. The placenta derived cells show a fibroblastoid, spindle-shaped morphology at passage 3 on day 5. The growth pattern of the cells from the term and first-trimester placenta was same as the bone marrow derived mesenchymal stem cells. Phase contrast: magnification ×100 for all figures.
