Hogwash. The Fourteenth Amendment requires the states to provide for the equal protection of the laws. Like the Fifth Amendment, it says that no person shall be deprived of life without a fair trial.
Which can only be applied to "fetuses" (unborn human individuals) if the legal concept of "personhood" is redefined. Now, while we would probably agree that the unborn are worthy of some legal protection, I would rather that "personhood" not be redefined from a legal perspective because doing so opens up a whole new can of worms with potential implications for citizenship (e.g., birth date vs. conception date, would an individual gain nationality status based on where they were conceived rather than born), and for legal rights (e.g., if the courts determined that a mother was not adequately protecting the legal rights of her unborn child, could they regulate her life in order to ensure that the child's legal rights are protected) in general.