Cord blood is the blood left in the placenta and umbilical cord after the fetus is delivered, the umbilical cord is ligated and disconnected. It contains hematopoietic stem cells that can rebuild the body’s hematopoietic and immune systems and can be used for hematopoietic stem cell transplants to treat a variety of diseases. Cord blood needs to be preserved by a specialized medical institution. The medical institution concerned can be informed in advance to prepare for the collection process to prevent any unexpected situation that may lead to failure in the collection process. Generally, cord blood is collected by the doctor or midwife who delivered the fetus in the first instance after birth. After the cord blood is collected, it is sent to the laboratory for hematopoietic stem cell separation. After separation, the hematopoietic stem cells are sampled and sent to the microscope, tested and then sent to the cold storage. The preservation temperature of cord blood needs to be controlled at -196℃ in liquid nitrogen environment, so that the biological enzyme system activity of cord blood hematopoietic stem cells is completely inhibited, but they still have the ability to proliferate and differentiate, and the preservation period is about 21 years, and they can be used as they are collected. Since cord blood stem cells are not contaminated by radiation, drugs, germs, etc., and have strong proliferation capacity, they can be used for clinical treatment of hematologic diseases, malignant tumors, autoimmune diseases, neurological injuries, etc. However, the price of cord blood preservation is high, so you can choose whether to preserve it according to your own situation.