There exists a widespread controversy over human embryonic stem cell research that emanates from the techniques used in the creation and usage of stem cells.
Human embryonic stem cell research is in controversy because, with the present state of technology, starting a stem cell line requires the destruction of a human embryonic and /or therapeutic cloning.
Opponents of the research argue that embryonic stem technologies are a slippery slope to reproductive cloning and can fundamentally devalue the human life.
Those in the profit movement argue that a human embryonic is a human life and is therefore entitled to protection.
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Controversy to this, supporters of embryonic stem cell research argue that such research should be pursued because the resultant treatments could have significant medical potential. It is also noted that excess embryos created for in vitro fertilization could be donated with the consent and used for the research.
However, recently it has been shown in principle that adult stem cell lines can be manipulated to generate embryonic like stem cell using a single cell biopsy similar to that used in pre implantation genetic diagnosis that may that may allow stem cell creation without embryonic destruction.
Thus, it is not the entire field of stem cell research, but the specific field of human embryonic stem cell research that is at the center of an ethical debate. But the ensuing debate has promoted authorities around the world to seek regulatory around the world to seek regulatory frameworks and highlighted the fait that stem cell research represents a social and ethical challenge.