Pt. 1: Moral status -- Stem cell therapy -- Xenotransplantation -- Concluding remarks -- Pt. 2: Life, death, and killing -- The value of life -- What is death? -- Killing versus letting die -- Concluding remarks -- Pt. 3: Personal identity -- Prenatal genetic intervention -- Advance directives -- Concluding remarks -- Pt. 4: The normativity of the 'natural' -- Managing reproduction -- Genetic enhancement -- Human cloning -- Concluding remarks: Deontic constraints on biomedicine