Cordbank is New Zealand's first dedicated and licensed cord blood collection, processing and storage facility. Umbilical cord blood is rich in stem cells, the immature cells that develop into part of the body's immune system. And it does not take much. Only 50 millilitres of cord blood contains millions of stem cells. Because these stem cells are compatible with your child's immune system, they can be used to fight more than 45 diseases, including leukaemia and Hodgkin's disease, with no risk of rejection.