"Some fertility issues are a sort of quality control system for our species." I am not discounting your argument, but quality isn't a stable value. A short-sig

"Some fertility issues are a sort of quality control system for our species." I am not discounting your argument, but quality isn't a stable value. A short-sighted or asthmatic person in a hunter-gatherer society might have been useless; nowadays, they may be an excellent engineer or doctor. With technology like the one being described in the article, you actually have a much higher chance of producing viable embryos free of known genetic problems. Dependence on technology, well, it is sorta dangerous, but also unavoidable. For example, the # of people who produce their own food is very small in the West. And that small number would become almost zero if we added further constraints (as in "don't use any industrially produced chemicals in the process"). Our ancestors from 200 years ago would probably consider us unviable. (And the actual hunters and gatherers would consider them unviable. What, you depend on good weather and rain not to starve?)