Where does the bible say that God intends those rights to apply, in full, to the unborn? It doesn't - it's an assumption. It's an assumption I happen to agree with but you're only kidding yourselves by pretending it's clear cut.
As it is written in
Psalm 139: 13 For you created my inmost being;
you knit me together in my mother's womb.
14 I praise you because I am fearfully and wonderfully made;
your works are wonderful,
I know that full well.
15 My frame was not hidden from you
when I was made in the secret place.
When I was woven together in the depths of the earth,
16 your eyes saw my unformed body.
All the days ordained for me
were written in your book
before one of them came to be.
I don’t know if I would call it assumption or interpretation. I guess some would. My understanding of these verses is He knew me before I was born. He created me, He knit me together. All my days were planned. I don’t think anyone should have the right to end that life that God created. So therefore All life from conception to natural death belong to Him the creator of life and no one has a right to take that life.