Sorry, I forgot to adress some other points after all of that. Prenatal/genetic screening, and embryonic modifications are not as easy as some people seem to think. there is simply not enough known about many disorders to detect them by these methods, and if they can be found, there is not necessarily anything we can do about it. The cost of thse is also a factor. Yes, they are used in some situations now, but not anything nearly comprehensive. If it was easy, it would already be taking place.
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