A. Embryonic stem cells are controversial because the embryos are discarded once the cells are extracted from them. Critics object to creation of embryos for the purpose of harvesting their cells.
B. Researchers are sourcing these to be discarded embryos for stem cells, and not creating new ones for the purpose.
C. The other objection is that the technology could be used in human reproductive cloning.
D. However given, the growth of infertility treatments and with more people opting for assisted reproductive techniques, fertility clinics end up with more embryos than they require.
E. Fears of reproductive cloning - as opposed to therapeutic cloning - are unfounded too, since the US, like most countries expressly prohibits it.
F. The Indian Council of Medical Research has laid down guidelines on stem cell research, following a proposal to set up a national apex committee for this purpose.
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