For me, it doesn't actually come down to contending rights, so much as my understanding of what pregnancy is. I tend to the view that birth is a mitzvah, a gift from the mother. It belongs to her, to give or not. 

You would have it that birth, in the last analysis, is the State's to give. 

If  birth is the State's to give, then let them give birth. It shouldn't be necessary to compel women to the task. What is shown, in forcing women to give birth, is not reverence for life, but rather a will towards slavery and cruelty. 

Women may of course be forced to do all sorts of things.  It is sad, but unsurprising, that so many wish to extort what is theirs to give, or not.