Unnatural selection
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Unnatural selection

Genetic science has presented us with one of the most complex ethical dilemmas of our time: what kinds of people should be born. Discussion hinges largely on a technology known as pre-implantation genetic diagnosis (PGD), which enables doctors to screen a couple’s embryos to ensure the child has not inherited the genetic predisposition for a serious hereditary disorder such as cystic fibrosis and Tay–Sachs disease or traits such as deafness. PGD is a routine part of in-vitro fertilisation (IVF) when one or both parents lives with a genetic disorder or carries its telltale gene, explains bioethicist Associate Professor Robert Sparrow.Most people would consider the ability to screen out embryos with such genes an unqualified good.

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Unnatural selection