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Genetic testing to yield 'donor child' relatively new
When Katie Trebing's parents considered creating a sibling to try to cure their daughter, they had few other families to seek out for advice -- the two geneticists who perform most of the tissue matching in the United States estimate only between 100 and 200 such donor children exist worldwide.
The first time preimplantation genetic diagnosis (PGD) successfully yielded a donor child was in...
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