momlogic's jenny: Before my son was born, I picked up a brochure at my OB/GYN's about Cord Blood Stem Cell Banking. Cord blood, which is also called "placental blood," is the blood that remains in the umbilical cord and placenta following birth and after the cord is cut. Cord blood, which is usually discarded with the placenta and umbilical cord, contains stem cells that are genetically unique to you and your family. Stem cells, can only be found in bone marrow, peripheral blood (the blood that circulates through your body), and umbilical cord blood ... And birth is the only time you can collect umbilical cord blood. Meaning, if your child develops a life threatening disease like leukemia, sickle cell, or even juvenile diabetes, doctors cannot use your child's stem cells to treat their illness unless you've collected it.