The idea of banking cord blood has been discussed in recent years, and it has not been without controversy. Rich in stem cells, cord blood can be used in place of bone marrow to treat many diseases. These include potentially life-threatening cancers like lymphoma and leukemia, and some immune disorders. The banking of cord blood has also been the subject of discussion for the ways that it can be used. But with all the uncertainties in raising a child, having some protection against future illness can be priceless.