CGS-authored

Researchers in New York have created what is believed to be the first genetically engineered human embryo, which critics immediately branded as a step toward “designer babies.”

But the researchers, at Cornell University, say they used an abnormal embryo that could never have turned into a baby.

“This particular piece of work was done on an embryo that was never going to be viable,” said Dr. Zev Rosenwaks, director of the Center for Reproductive Medicine and Infertility at NewYork-Presbyterian/Weill Cornell hospital. He said the purpose of the work was stem cell research.

That did not stop some from criticizing the work, saying that the techniques being developed could be used by others to create babies with genes modified to make them smarter, taller, more athletic or better looking. They also said there should have been more public discussion.

“It’s an important ethical boundary that scientists have been observing,” said Marcy Darnovsky, associate director of the Center for Genetics and Society, a watchdog group in Oakland, Calif. “These scientists, on their own, decided to step over that boundary with no public...