I'm pro-choice.
I believe the decision should be that of the individual. There would be occasions that the would be human's conditions would really suck if they were born.
Personally I would do my best to protect a child of mine from being aborted, BUT that's just me. The thought of raising a kid one day almost excites me.

But yeah, I couldn't personally justify taking away a person's freedoms no matter how I felt on the matter.

(And on a lighter (non serious, and somewhat horrible) note, abortions could kill 2 birds with one stone. Not only could they stop a child from being born into an unloving family, the meat could be sold cheaply to starving people of poorer nations. Everybody wins!)