Cord blood is blood collected from the umbilical cord. Since cord blood is collected after birth, there is no risk for the donor. Cord blood is comprised of high concentration of mesenchymal stem cells which can differentiate into hematopoietic stem cells as well as cartilage, bone, muscle, and nerve. Most importantly, umbilical cord blood-derived stem cell is the healthiest and most primal type of adult stem cell. Thus, in terms stem cell therapy development, umbilical cord blood-derived stem cells have significant advantages.