Millions of parents have paid to bank blood from their infants’ umbilical cords. But storage companies have misled them about the cells’ promise. Millions of parents have paid to bank blood from their infants’ umbilical cords. But storage companies have misled them about the cells’ promise. Blood, Stem Cells, Bone Marrow, Pregnancy and Childbirth, Parenting, Advertising and Marketing, Transplants, Clinical Trials, Cerebral Palsy, Children and Childhood, Babies and Infants, your-feed-healthcare NYT > Science