So you decide to jump into this thread a week after it's dead huh? Remind me, what's your job? You work in a biochemistry lab?

To summarize:
- Screening is easiest (aka not GM), modification is harder
- At conception is easiest, after is plausible but more work needed
- Things that are expensive get cheaper over time usually
- In the future many things may be different

So what's the current state of things? What could we feasibly do right now? We can obviously screen for many things, anything that has an associated gene identified can be screened - so the "Gattaca" scenario is already possible - yet strangely the world hasn't collapsed into dystopia. Perhaps it's not such a big deal afterall.