`` Little is known about the short- and long-term genetic effects , '' says a U.S. bioethicist . Government takes a step toward allowing an IVF technique involving DNA from 3 people . It is intended to prevent mitochondrial disorders being passed on from mother to child . Comment:
`` Little is known about the short- and long-term genetic effects , '' says a U.S. bioethicist . Government takes a step toward allowing an IVF technique involving DNA from 3 people . It is intended to prevent mitochondrial disorders being passed on from mother to child . Mitochondria are `` powerhouse '' cells of the body ; defects can cause serious health issues .