What you are saying and/or implying is exactly true. There's no arguement against a fully born child being a human being. The arguement is only against an unborn child being a full human being. What I'm saying is that I don't fully believe that a clump of cells represents a human being. I do draw a distinction between the trimesters, but again, that's gray area. I think that abortion should be legal up to a point, but I do not feel qualified to determine what that point is.
Edit: Sorry, nefrodite, I misunderstood what you were saying.