Donor stem cells can be collected through several methods. The most common methods are:
1. Bone Marrow Harvesting: The donor undergoes a surgical procedure under anesthesia to extract stem cells directly from the bone marrow, usually from the pelvic bones. 2. Peripheral Blood Stem Cell Collection: The donor receives injections of growth factors for several days to mobilize stem cells into the bloodstream. These cells are then collected via apheresis, a process that separates stem cells from the blood. 3. Umbilical Cord Blood: Stem cells are collected from the umbilical cord and placenta after childbirth and stored in a cord blood bank for future use.