This debate is so tired...personally, although I believe that life begins at conception, I also support abortion. Shocking, I know. There is one consideration I don't recall seeing mentioned here:
According to the World POP Clock projection, found on the US Census Bureau website
here, the current world population is 6,419,856,854. It's not like there's any shortage of people - we are overbreeding ourselves into a real mess here.
The ancient tribal cultures upon whose traditions most religions today are based encouraged people to be fruitful and multiply because that would encourage survival of their particular gene pool and cultural group. It also made sense due to high mortality rates and the need for labor. We live in a radically different world today. I personally don't believe there is anything inherently good about the notion of bringing more human lives into this world.
As for the folks who want to adopt...sorry, I don't know what to say about that. I think that might just be one of those "too bad" kind of things.