“Stem cells are undifferentiated, primitive cells with the ability both to multiply and to differentiate into specific kinds of cells. Stem cells hold the promise of allowing researchers to grow specialized cells or tissue, which could be used to treat injuries or disease (e.g., spinal cord injuries, Parkinsons disease, Alzheimers disease, diabetes, strokes, burns).” (Slevin, 2010)
Why is the task of disposing of unused frozen human embryos different from disposing of other medical tissue?