Cord blood holds hematopoietic stem cells, and cord tissue carries mesenchymal...

https://emedicodiary.com/post/2217/from-birth-to-bedside-how-umbilical-cord-stem-cells-are-changing-modern-medicine

Cord blood holds hematopoietic stem cells, and cord tissue carries mesenchymal stem cells. Because these cells degrade fast, timing is critical. Doctors must harvest them at birth to ensure viability for future medical use