"I've answered that Roe vs. Wade was correctly decided IMHO."
Where in the Constitution is the power for SCOTUS to make the determination of when life begins? What is the Constitutional basis for the holding of Roe?
While I will leave the legal arguments to you and Bigdog (I learn a lot) I'll take a stab at it.
"It is thus apparent that, at common law, at the time of the adoption of our Constitution, and throughout the major portion of the 19th century, abortion was viewed with less disfavor than under most American statutes currently in effect. Phrasing it another way, a woman enjoyed a substantially broader right to terminate a pregnancy than she does in most States today. At least with respect to the early stage of pregnancy, and very possibly without such a limitation, the opportunity to make this choice was present in this country well into the 19th century. Even later, the law continued for some time to treat less punitively an abortion procured in early pregnancy."
"The Constitution does not explicitly mention any right of privacy. In a line of decisions, however, going back perhaps as far as Union Pacific R. Co. v. Botsford, 141 U.S. 250, 251 (1891), the Court has recognized that a right of personal privacy, or a guarantee of certain areas or zones of privacy, does exist under the Constitution. In varying contexts, the Court or individual Justices have, indeed, found at least the roots of that right in the First Amendment, Stanley v. Georgia, 394 U.S. 557, 564 (1969); in the Fourth and Fifth Amendments, Terry v. Ohio, 392 U.S. 1, 8-9 (1968), Katz v. United States, 389 U.S. 347, 350 (1967), Boyd v. United States, 116 U.S. 616 (1886), see Olmstead v. United States, 277 U.S. 438, 478 (1928) (Brandeis, J., dissenting); in the penumbras of the Bill of Rights, Griswold v. Connecticut, 381 U.S. at 484-485; in the Ninth Amendment, id. at 486 (Goldberg, J., concurring); or in the concept of liberty guaranteed by the first section of the Fourteenth Amendment, see Meyer v. Nebraska, 262 U.S. 390, 399 (1923). These decisions make it clear that only personal rights that can be deemed "fundamental" or "implicit in the concept of ordered liberty," Palko v. Connecticut, 302 U.S. 319, 325 (1937), are included in this guarantee of personal privacy. They also make it clear that the right has some extension to activities relating to marriage, Loving v. Virginia, 388 U.S. 1, 12 (1967); procreation, Skinner v. Oklahoma, 316 U.S. 535, 541-542 (1942); contraception, Eisenstadt v. Baird, 405 U.S. at 453-454; id. at 460, 463-465 [p153] (WHITE, J., concurring in result); family relationships, Prince v. Massachusetts, 321 U.S. 158, 166 (1944); and childrearing and education, Pierce v. Society of Sisters, 268 U.S. 510, 535 (1925), Meyer v. Nebraska, supra.
This right of privacy, whether it be founded in the Fourteenth Amendment's concept of personal liberty and restrictions upon state action, as we feel it is, or, as the District Court determined, in the Ninth Amendment's reservation of rights to the people, is broad enough to encompass a woman's decision whether or not to terminate her pregnancy. The detriment that the State would impose upon the pregnant woman by denying this choice altogether is apparent. Specific and direct harm medically diagnosable even in early pregnancy may be involved. Maternity, or additional offspring, may force upon the woman a distressful life and future. Psychological harm may be imminent. Mental and physical health may be taxed by child care. There is also the distress, for all concerned, associated with the unwanted child, and there is the problem of bringing a child into a family already unable, psychologically and otherwise, to care for it. In other cases, as in this one, the additional difficulties and continuing stigma of unwed motherhood may be involved. All these are factors the woman and her responsible physician necessarily will consider in consultation."
"On the other hand, the appellee conceded on reargument that no case could be cited that holds that a fetus is a person within the meaning of the Fourteenth Amendment"
"All this, together with our observation, supra, that, throughout the major portion of the 19th century, prevailing legal abortion practices were far freer than they are today, persuades us that the word "person," as used in the Fourteenth Amendment, does not include the unborn."
"It should be sufficient to note briefly the wide divergence of thinking on this most sensitive and difficult question. There has always been strong support for the view that life does not begin until live' birth. This was the belief of the Stoics.
It appears to be the predominant, though not the unanimous, attitude of the Jewish faith."
"It may be taken to represent also the position of a large segment of the Protestant community, insofar as that can be ascertained; organized groups that have taken a formal position on the abortion issue have generally regarded abortion as a matter for the conscience of the individual and her family." (as a disclaimer, I am protestant)
"It has generally been contingent upon live birth.
In short, the unborn have never been recognized in the law as persons in the whole sense."
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for the period of pregnancy prior to this "compelling" point, the attending physician, in consultation with his patient, is free to determine, without regulation by the State, that, in his medical judgment, the patient's pregnancy should be terminated. If that decision is reached, the judgment may be effectuated by an abortion free of interference by the State."http://www.law.cornell.edu/supct/html/historics/USSC_CR_0410_0113_ZO.html