Cord blood , or placental blood, is the blood left behind in a baby’s umbilical cord after it’s been cut. This blood contains many types of stem cells, including HEMATOPOITIC STEM CELLS can be differentiate and proliferate into other blood cells in the body. These cells exit only in the bone marrow, cord blood, and peripheral blood, and can be transplanted to treat patients with blood disorders, Immunodeficiency’s, and other diseases. Like all your baby’s cells, cord blood stem cells are genetically unique to each individual and genetically similar to the stem cells of family members. Unlike bone marrow, cord blood cells can be easily collected, although at only one point in life: immediately after birth.