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August 02, 2017



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In a first, scientists have edited genes in human embryos to prevent a disease. The feat renews concerns about “designer babies.”<http://p.nytimes.com/email/re?location=4z5Q7LhI+KVBjmEgFdYACPLKh239P3pgVbYEUQrVypgzTiba1XeSBIPcKirvTjr3RckNn9mJ2O+XxBdR8QA6OCjx46pUH7j9B36zCJrQwxITbAHmFkUfA80e6pPyRCl0WAxqXJXikvgvdKYzXzFucUdz1vsTQ/TLDWpzmpLnGoQ=&campaign_id=132&instance_id=100963&segment_id=111291&user_id=bfb3fe240884b000d67a50f469d64f28&regi_id=69087745>



Wednesday, August 2, 2017 1:04 PM EDT







Scientists for the first time have successfully edited genes in human embryos to repair a common and serious disease-causing mutation, producing apparently healthy embryos, according to a study published on Wednesday.



The research marks a major milestone and, while a long way from clinical use, it raises the prospect that gene editing may one day protect babies from a variety of hereditary conditions.



But the achievement is also an example of genetic engineering, once feared and unthinkable, and is sure to renew ethical concerns that some might try to design babies with certain traits, like greater intelligence or athleticism.



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