Careful of what you wish for. I look forward to a future court case that establishes once and for all the definition of a person. Although, with the current Supreme Court, I do admit some hesitation.
I mean, if you want to establish rights for a fetus, what do you do when that fetus belongs to a “Mexican”? What do you do if a pregnant American moves to another country without the permission of the fetus? Not to say these are legit examples, but the courts will fill with bizarre cases like this.
More interestingly, what do you do when science stands up in court and establishes a fact that opposes your belief? Your beliefs have gotten you this far. It’s very plausible that you will lose some of the ground you’ve gained.