Embryonic stem cell research has been associated with significant complications such as the development of aggressive sarcomas. However, adult stem cells hold promise for actual therapeutic application. While researchers persist in touting the potential of human embryonic stem cells, successful therapeutic application in humans has only been demonstrated with adult stem cells.
If the human embryo is a human person, as many believe, then experimental use of the embryo is always abuse and must not be condoned under any circumstances We do not need to go down the immoral route of destroying embryos when adult stem cells show so much promise.