How long can umbilical cord blood be stored? Cord blood preservation is an emerging health care option. When the child is born, the umbilical cord blood is frozen and can be used in future treatments. While cord blood is not a complete replacement for genomic banking, it has been shown to enable clinical treatments for certain conditions. However, cord blood is not a permanent substance and may lose its effectiveness if not stored properly. In this article, we discuss how long cord blood can be stored, as well as the considerations and benefits of storage