Use of Embryonic Stem Cells in Research

In 1998, Dolly the lamb made headlines for being the first successful product of reproductive cloning. Human reproductive cloning, however, is almost universally banned. In contrast to reproductive cloning, therapeutic cloning allows scientists to produce embryonic stem cells that can develop into any cell type in the body. Thus, embryonic stem cells could potentially provide a supply of replacement human organs. At this point, only embryonic, and not adult stem cells, have the biological capacity to differentiate into any type of cell. Recently, the Chief Medical Officer of England, Professor Liam Donaldson, recommended that certain kinds of therapeutic cloning be permitted. Moreover, NIH has just issued guidelines that will allow federally funded research on human pluripotent stem cells. Such stem cell research has the potential benefit of treating such diseases as Parkinson's and Alzheimer's, among others. However, critics of using embryonic stem cells for research say it could lead to the production and commodification of embryos.
Should embryos be used to perform embryonic stem cell research?
No, because using embryos in such a fashion is unethical.
No, because adult stem cells can eventually be used in place of embryonic stem cells.
Yes, because embryonic stem cell research offers considerable benefits in treating a variety of severe disorders.
Yes, because careful monitoring and regulation will ensure that abuses do not occur.