With alternatives to hes cells now available the debate over stem cell research is becoming increasingly irrelevant but ethical questions regarding hes cells may not entirely go away for now some human embryos will still be needed for research ips cells are not exactly the same as hes cells and hes cells still provide important controls . The stem cell controversy is the consideration of the ethics of research involving the development use and destruction of human embryosmost commonly this controversy focuses on embryonic stem cellsnot all stem cell research involves human embryos for example adult stem cells amniotic stem cells and induced pluripotent stem cells do not involve creating using or destroying human . The largest controversy with stem cell research is the use of an embryo this deals with the controversies surrounding laws and beliefs regarding contraception abortion and in vitro fertilization. In the meantime stem cell research and the careers of stem cell researchers hang on a legal roller coaster although stem cells have great potential for treating diseases much work on the science ethical and legal fronts remains for more on stem cells investigate the links on the following page. This research is focused on the two mammalian stem cell types namely the embryonic stem cells and adult non embryonic stems cells in the former case the stem cells are isolated from the inner cells of the 3 5 day old embryo the blastocysts whereas adult stem cells are isolated from adult tissues
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