Cord blood is the blood left in the umbilical cord and placenta after the birth of the child and is collected after the cord has been cut off. The umbilical cord is routinely discarded with the placenta after a child is born. It is also called placental blood. Cord blood has lots of blood producing stem cells which can be frozen and later used for transplants. Cord blood is genetically unique to the child and the family. Now researchers have found that it can be used to treat many diseases.

Cord blood is now used as an alternative to bone marrow transplant when in future if the child or his family is diagnosed with cancers such as leukemia, lymphoma and other disorders of the blood-making system, such as sickle-cell anemia; severe immune-system disorders; and genetic defects affecting the blood-making system. Researchers are further studying the use of cord blood for the treatment of different types of diseases like arthritis, spinal cord damage, stroke diabetes and Alzheimer