Having your baby’s cord blood stem cells stored separately will not reduce the cell dose and compromise the treatment outcome of future treatments. This is because when you store with a private cord blood bank, all the cord blood units belong to your child for your family’s own use.
Source: (Rubinstein, P. (2009) Cord blood banking for clinical transplantation. Bone Marrow Transplantation. 44. pp. 635-642)