There is a distinct difference between a child that is born, and a fetus that can not survive outside the womb (is not a seperate life). No being has the inherent right to occupy another's body against that person's will.
The legal counter to that argument will be very easy to make in court using both the legal precedents set in our legal homicide laws and simple logic.
Unless the woman was raped, the only reason the child where it is and the only reason it is in that physical relationship with her. . . is because of the actions and risks that she took along with her partner to put it there.
The courts will agree that a child that is invited into that relationship - by the actions of his/her parents - has the legal right to be there.
You very well could be (and in my opinion should be) charged with MURDER in that case.
So good luck trying to use that argument in defense of abortion in a courtroom.
Agree.
As for the parasite claim, that is easily defeated too.
If you think either of those two arguments are so profound, I would like to see your explanation for why they have never been presented in a courtroom / legal setting.
If the fetus is unwanted, then it is a parasite.
Call it anything else you want to.
So long as our laws recognize it as a human being - it is Constitutionally entitled to the Equal protections of our laws.