Summary
Stanford bioethicist Henry Greely predicts that a large proportion of human pregnancies — perhaps even 90% in the United States — will one day result from in vitro gametogenesis (IVG), the production of eggs and sperm from undifferentiated human cells.
Greely suspects that eventually most prospective parents — even those without fertility problems — will opt for IVG to reduce the risk of bearing offspring with genetic defects or to select for desirable traits.
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