As clearly stated in the article, they used embryos with too many chromosomes to be viable.
>the main ethical issue is "messing" with creation, however you believe creation happened
http://en.wikipedia.org/wiki/Appeal_to_nature
As clearly stated in the article, they used embryos with too many chromosomes to be viable.
>the main ethical issue is "messing" with creation, however you believe creation happened
http://en.wikipedia.org/wiki/Appeal_to_nature