2 part question.
Is abortion a right?
Is it moral?
Oh ****. Here we go.
Okay. I'll play this for awhile with my extremist moderation.
Under what moral truths can you derive abortion as right?
Under what moral truths can you conclude abortion isn't a right?
I think the problem is that the extremes on both sides can't or won't recognize that there are competing moral truths here. The extreme pro-abortion position says that the mother's right to choose is the only consideration, that the unwanted birth is the only moral consequence of that decisioon.
The extreme anti-abortion position does not recognize the mother's right to choose at all. That the only moral consequence for that position is the life of the unborn.
Most people have a hybrid view. Either choice has consequences, and it often depends on circumstances which right has a higher priority.