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Depiction of CRISPR--purple strand of DNA being cut from them middle of two orange strands

A group of prominent scientists and bioethicists is calling for a global moratorium on any new attempts to bring gene-edited babies into the world.

"We call for a global moratorium on all clinical uses of human germline editing — that is, changing heritable DNA (in sperm, eggs or embryos) to make genetically modified children," the 18 scientists and bioethicists from seven countries write in an article published Wednesday by the journal Nature.

The call was prompted by the announcement last year by a scientist in China, He Jiankui, that he had used the powerful new gene-editing technique CRISPR to create the world's first gene-edited babies. He says he edited the twin girls' DNA when they were embryos to try to protect them from the AIDS virus.

The announcement was widely condemned as unethical and irresponsible. It also prompted an intense debate about whether more could have been done to have stopped the scientist — and should be done now to try to prevent any more researchers from going rogue.

In response, the new coalition of scientists and bioethicists... see more