Umbilical cord blood provides hematopoietic stem cells for treating blood...

https://xeon-wiki.win/index.php/If_I_Bank_Cord_Blood,_Can_It_Be_Used_for_a_Sibling_Later%3F

Umbilical cord blood provides hematopoietic stem cells for treating blood disorders, while cord tissue yields mesenchymal stem cells for tissue repair. Because viability drops quickly, teams must collect these samples immediately after birth.