I acknowledge that keeping the baby brings up a whole new collection of problems, and that adoption is not the greatest solution in the world.

However, personally, religiously, and even rationally, I am and always will be pro-life. Consider this - if some microscopic bacteria was found on another planet, scientists would herald that as the discovery of life on a planet besides Earth. So how is a baby (fetus, whatever word you prefer) not a human being, and how can killing it be justified?

The thing you said on thinking - would a mentally impaired person constitute a human being?