China plans 'hybrid' embryonic stem cells
The scientists hope to use the ‘hybrid’ embryos to generate embryonic stem (ES) cells for research into regenerative medicine. But so far the embryos created by the Chinese scientists have not developed into blastocysts — the stage needed before ES cells can be isolated from human embryos.
The research has attracted criticism in China, where pressure is increasing to introduce tighter ethical regulation of biomedical research.
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Reference: Nature 413, 339 (2001)