While I understand that there are a number of arguments for and against all this, I'm just not comfortable in declaring an unborn fetus a human being. What makes a human being so special, as far as I'm concerned, is that spark of creativity that goes along with our general awareness of the world. A fetus has neither of those things, and while I know that they will one day gain that level of cognition, they aren't what I would call a "person" yet.
And since they are no more than chunks of gestating cellular material, I am perfectly fine with the idea of abortion. Especially if that means we can pick and choose just what type of person this fetal mass will develop into one day. For example, while I have nothing but respect and compassion for those born with Down Syndrome, there's no reason that there should be anyone born with that condition anymore. That the condition still exists in living people is a shameful reflection of our inability to make even the most basic decision on what is worthy of being considered a desirable human.
There are many questions and problems that go along with this mindset, of course. Much of wish I seem to believe comes off as a type of eugenics. And to an extent, I would agree with that criticism. There was much that was wrong with the eugenics movement. But the basic premise that we can better the human species by making simple, common sense choices on what basic traits are worthy of the word "human", is a reasonable notion to me. Though such a notion is fraught with perilous questions and problems, I think that it is an attainable ideal.
Just as a gardener can prune his garden to make it more beautiful, we can nip a number of conditions in the bud that would otherwise detract from a person's experiencing a full human life. A new term would be men other than eugenics though. One that doesn't have all of that genocide, racism, and clinical murder baggage attached to it. And now of this really touches on issues such as a potential father's parental rights. But as a basic justification for abortion, I think there's enough to this point of view for it to be worthy of consideration.
(Yeah, suck on that autistic wall of text, Deep Thoughts.)