Evaluation of UC-MSC pluripotency. (A) P4 UC-MSCs were induced with differentiation kits according to manufacturer’s instructions. After 21 days of adipogenesis differentiation, adipocytes were stained by oil red O. (B) After 21 days of osteogenesis differentiation, osteocytes were stained with Alizarin red. (C) At the end of chondrogenesis differentiation, chondrocyte mass was stained with Alcian blue. Representatives are shown at 100 × magnification.