The movie Gattica does a good job of showing an example society driven by designer babies. The normal babies get shifted down to second rate citizens because the gene taylored humans are so superior in every way.
Brave New World by Aldous Huxley is an excellent excellent science fiction book. It has fetuses having their oxygen intentionally withheld so those babies will grow up stupid and fill the lower classes. After all, would a genius be interested in sweeping floor and taking out garbage?
I find the idea of tampering with humans (adults, children, fetuses, and fertalized eggs) to be a very morally charged issue. It treats genetically unique individuals as objects that can be shaped, used, and discarded at will, rather than treating them as true human beings.
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