The reason behind storing of cord blood stem cell contains hematopoietic cells, used in an emerging field of medicine called regenerative therapy. Diseases like cerebral palsy, hearing loss and diabetes may be treated with cord blood. While harvesting bone marrow cells is painful and time-consuming, cord blood can be transplanted instantly and causes no harm to the mother or baby. Children from a mixed ethnic background will have a harder time finding a bone marrow donor, so banking cord blood is especially valuable for these patients.