The use of human embryos for research on embryonic stem ES cells is currently high on the ethical and political agenda in many countries. Despite the potential benefit of using human ES cells in the treatment of disease, their use remains controversial because of their derivation from early embryos. Human embryonic stem cells hES cells are currently discussed not only by the biologists by whom they were discovered but also by the medical profession, media, ethicists, governments and politicians. There are several reasons for this. To date, most embryos used for the establishment of hES cell lines have been spare embryos from IVF, but the creation of embryos specifically for deriving hES cells is also under discussion. The UK has been the first to pass a law governing the use of human embryos for stem cell research.
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In November , two teams of U. Since then, research that utilizes human embryonic cells has been a widely debated, controversial ethical issue. Human embryonic cells possess the ability to become stem cells, which are used in medical research due to two significant features.