Peripheral blood stem cell donation is a medical procedure used to collect stem cells from a donor's blood. This process typically involves a donor receiving medication for several days to increase the number of stem cells in their bloodstream. After this preparation, blood is drawn from the donor, and a machine separates the stem cells from other blood components. The remaining blood is returned to the donor. The collected stem cells can be used to treat various conditions, including certain types of cancer and blood disorders. This donation is crucial for patients who need a stem cell transplant, as it can help restore healthy blood cell production in their bodies.