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

https://future-wiki.win/index.php/Public_Cord_Blood_Donation_vs._Private_Banking:_A_Clinical_Perspective

Umbilical cord blood provides hematopoietic stem cells for blood disease treatment, while cord tissue contains mesenchymal stem cells for regenerative medicine. You must collect both samples immediately after delivery. This timing maximizes cell quality.