You yourself talked about "until they reach 18 years of age"; abortion is clearly but one aspect of this, and arguably not the biggest one by far (there are far more children who are born, but have their rights limited until they are of age, than aborted fetuses).
I didn't want to touch on abortion for the simple reason that it's vastly more complicated - there's the issue of when you start considering a fetus a person (it is obvious to any rational person that a fertilized egg or an embryo is not a person in any meaningful way, while a pre-birth fetus is; but where do you draw the line in between?). There's also the sticking issue of the fetus, regarding of any rights it may have as a person, potentially infringing on its mother's rights to her body. Reconciling those two rights is not obvious.
In any case, none of this has anything to do with this particular case.