With all due respect TigersEye, your statement brings to mind the liberal argument that Clause 5 of Section 1 of Article II, the natural born citizen clause, is not defined in the Constitution. But a little research reveals that nbc is a well-understood, well-documented legal term that the drafters of the Constitution were familiar with. This is why I don't put much faith into the side-door argument of claiming that "person" is undefined in Section 1 of 14A, particularly since Bingham also used the word born in that statute.
You sound more like the liberal arguing that a fetus does not deserve the legal status of ‘person’ accorded to all other human beings.