bumping this thread for possible comments by medical people

While I agree with your assessment, it should be realized there are some rather profound ethical consequences to the behavior you postulate.

Wasn't it Hitler who wanted to create the "Master Race?"

Do you think for a second the Vatican would tolerate let alone condone exploration in this vein?

As an example, consider the ethical ramifications relating to working with stem cells.

Now, I'm certainly not attempting to create anything of a sensational aspect via my response, but these observations along with likely a million others I've not even begun to consider are certain to pose some prickly problems. Especially when any collective geography might consider experimentation in this area perfectly reasonable and rational and another group would consider it at best blasphemous.

We as a global society seem to either be unwilling or incapable of tolerating societies practicing any form of spiritual affiliation without repercussions from other groups.

Until some of the other aspects of the sociopolitical / ethical / religious aspects of this whole ball of wax can be agreed to at a global level, I doubt these kinds of technological advances are in the offing any time soon.

But it's fun to dream about the potential realization of such possibilities.

Widening the discussion to general health tests, it is felt by many experts that unnecessary health screening does more harm than good.

http://news.bbc.co.uk/1/hi/health/8030253.stm

If there's nothing wrong with you, why go looking? Obviously, this doesn't apply to all diseases - but there is a point where screening becomes useless. And when there's a private company trying to push the scans, caution is advisable.