What are the other sources of stem cells?
Bone marrow: Stem cells can be collected from the bone marrow. However, the collection procedure is invasive, time-consuming, requires an anaesthetic and is painful for the donor. Perhaps the biggest hurdle in bone marrow stem cell transplantation remains the finding of a perfect match. This has proven to be quite difficult and sometimes impossible. Peripheral Blood: The use of bone marrow has primarily been replaced by collecting stem cells from the circulating (peripheral) blood (often from adult donors as part of their treatment for their underlying disease).