Wikipedia
Cord blood
Umbilical cord blood is blood that remains in the placenta and in the attached umbilical cord after childbirth. Cord blood is collected because it contains stem cells, which can be used to treat hematopoietic and genetic disorders.
Usage examples of "cord blood".
They'd met when Lee, then a lowly assistant, had been assigned to aid in Charles's research to harvest stem cells from umbilical-cord blood for bone-marrow transplants.