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Published online by Cambridge University Press: 27 September 2012
There is ongoing debate about whether it is ethically acceptable to allow the creation of cloned embryos in order to produce human stem cells. A cloned embryo is created through a process called somatic-cell nuclear transfer, often known as ‘therapeutic’ cloning. The value of stem cells lies in their capacity to become any sort of cell in the human body. This capacity is particularly useful for treating medical conditions where stem cells can be used to repair or replace damaged tissue. The value of a cloned embryo is that the DNA from a person who needs stem cell treatment can be used to create the clone and thereby minimise the likelihood that any inserted stem cells will be rejected. Research on the use of cloned stem cells is in its earliest stage.
1 This is not to deny that some couples do indeed agonize over the destruction of their own embryos, though not over the destruction of somebody else's.