New Bay Area research suggests it may be possible to forecast an embryo’s risk for common diseases.
A Silicon Valley company has designed a technique to decipher the genetic code of a tiny embryo and calculate its future risk of cancer, diabetes and 10 other common diseases – presaging a day when parents could select children with a greater chance of living a healthier life.
While such testing sounds seductive, it raises an unsettling ethical question: When it is right for prospective parents to do “quality control”? Genetic testing of embryos is usually offered only to families at risk of deadly and incurable single-gene disorders such as Huntington’s or Tay-Sachs disease. It spares parents the heartbreak of conceiving a child who will inevitably sicken.
IVF embryos are already judged on general fitness, such as the number and quality of their cells. Only the best embryos are implanted; lesser embryos are stored or discarded. The researchers agree that the clinical utility of its approach remains to be proven. The exercise was strictly experimental, said the Stanford-trained Kumar.
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