How long should umbilical cord blood be stored? (About the storage and application of umbilical cord blood) Umbilical cord blood is the blood trapped in the umbilical cord after the baby is born, which contains rich hematopoietic stem cells. Because these stem cells can be used to treat many diseases, many parents want to preserve their children\’s cord blood. However, there are no fixed regulations for the storage time of umbilical cord blood. The following aspects discuss the doubts about umbilical cord blood storage. Can a child’s own umbilical cord blood stem cells be used?