Storing cord blood is not necessary and can be decided on an individual basis. Umbilical cord blood is the blood that remains between the umbilical cord and the placenta when the umbilical cord is tied and severed after the successful delivery of the fetus. Umbilical cord blood contains hematopoietic stem cells that can rebuild the body’s hematopoietic and immune systems, supplying hematopoietic stem cell transplants for the treatment of diseases such as leukemia, aplastic anemia, and severe immunodeficiency diseases. Many people want to store cord blood to treat certain diseases when necessary. Cord blood is not always used, firstly the probability of developing these diseases is itself very low. Secondly, the effectiveness of the hematopoietic stem cells in the body may also diminish after a long period of time when cord blood is stored from birth. Again, if the child’s own stem cells are problematic, cord blood saved after birth, without the existence of immune conditions, is less effective in treating the disease. In addition, the price of preserving cord blood is high, so mothers can consider whether they need to preserve cord blood according to their own financial situation and other factors.