(Portland, OR) -- Portland scientists are celebrating the first successful U.S. editing of genes on embryos. The successful procedure at the Oregon Health and Science University was announced yesterday. The procedure broke new ground both in the number of embryos used and by showing it's possible to safely and efficiently correct defective genes that cause inherited diseases. Reports say the embryos were allowed to develop only a few days. Some countries have banned gene editing out of concerns it could be used to create so-called designer babies.