"One should not lightly conclude from the Supreme Court's holding in Roe that the concept of "person" has no prenatal significance, that the unborn was not, after all, entitled to a "day in court." Such a conclusion assumes the outcome. Furthermore, it would be sound only if one is willing to assume that the adversary process is not essential to sound judicial decision-making-an assumption hardly compatible with the common law tradition. To a great degree, judicial decisions are made legitimately only if there is an opportunity for vigorous advocacy, an opportunity not allowed the fetus in the cases thus far in which his right to personhood or, expressed differently, its right to even have rights, has been adjudicated."