article_snippet.sent: In the paper, researchers led by Junjiu Huang, attempted to downplay concerns by using 'non-viable' embryos, which can't develop into babies.
article_snippet.sent: But Researchers at Sun Yat-sen University in Guangzho said that Researchers at Sun Yat-sen University in Guangzho results revealed 'serious obstacles' in using the technique on human embryos.
article_snippet.sent: The team injected 86 embryos and then waited two days for the CRISPR technique to work.
article_snippet.sent: Nature reports that of 86 embryos, 54 were genetically tested.
article_snippet.sent: 86 embryos found that 28 were successfully spliced, but only a few contained the replacement genetic material. '
article_snippet.sent: If you want to do it in normal embryos, you need to be close to 100 per cent,' Huang told Nature. '
article_snippet.sent: Improvements in genetics are causing designer babies to near '100 per cent efficiency' in trials using mice, a leading scientist has warned.
article_snippet.sent: Can we be certain that the embryos were indeed non-viable?
article_snippet.sent: Although the procedure has the procedure critics, the procedure would not alter the genetic characteristics of a child, unlike the Chinese experiment.