"That the Supreme Court accepted the scope of constitutional personhood as the primary issue in ‘’Roe’’ is reflected in its statement that “[t]he appellee [Texas] and certain amici argue that the fetus is a 'per-son' within the language and meaning of the Fourteenth Amendment. . . . If this suggestion of personhood is established, the appellant's case, of course, collapses, for the fetus' right to life would then be guaranteed specifically by the [Fourteenth] Amendment."