 Since the kidney is the most commonly transplanted organ and since the ethics literature on organ sale is mainly about kidney sale from live donors, that is the practice on which this entry will focus. ‘Organ sale’ as the term is used here does not include the sale of body products (a category which includes blood, eggs, hair, and sperm) since this is different in some important respects. For example, the risk of permanent harm is generally much less in the case of blood and hair donation; while, the donation of eggs and sperm raises additional issues relating to the creation and parenting of additional future people.  That said, many of the fundamental issues are similar and the very same concerns about (for example) exploitation and consent arise in both cases. 