Human embryonic stem cell was first discovered
in 1998(6). This brought about ethical controversies
on harvesting techniques, storage methods, research
regulation and appropriate control for future clinical
applications. However, there are various unique useful
characteristics of human embryonic stem cell that
cannot be found in other cell types. As a result, human
embryonic stem cell has been focused as the promising
therapeutic tool even though there is no final conclusion
on the appropriate regulation and control.