In what way is it "obvious" that a fetus can never have any rights?
EVERYONE on the pro-abortion side says they're property. "My body, my choice" is (mistakenly) claiming that the fetus is nothing more than a part of a woman's body, to dispose of as she chooses. So is "It's a parasite", for that matter. (Oh, and no, a fetus is not "harmful" to a woman if she doesn't want a baby. That only works if you're a spoiled child who thinks you're entitled to never have anything happen that you don't want.)
If you're trying to make the argument that killing babies is an "inherent right", you're going to have to show your work. Freedom has a long, documented history of being viewed as an "inherent right" in this country; killing innocent humans, not so much.