The idea that a child should be able to get an abortion without her parents' knowledge is a shocking one. A student cannot even get an aspirin from the school nurse without parental permission. It would be a strange dichotomy if states could require parental consent for an aspirin, but not parental consent for abortions.
They are completely different situations. That said, I hate the parental notification law, because it then puts the decision in the hands of the girls' parents, where it should not be.
