Except for the three opening sections of the O'Connor–Kennedy–Souter opinion,
Casey was a divided judgment, as no other sections of any opinion were joined by a majority of justices. The plurality opinion jointly written by Justices O'Connor, Kennedy, and Souter was recognized as the principal opinion.
O'Connor, Kennedy, and Souter plurality opinion In the 1992 case of
Planned Parenthood v. Casey, the authors of the plurality opinion abandoned ''Roe's
strict trimester framework but maintained its central holding that women have a right to have an abortion before viability. The plurality asserted that the fundamental right to abortion was grounded in the Due Process Clause of the Fourteenth Amendment, and the plurality reiterated what the Court said in Eisenstadt v. Baird'': "If the right of privacy means anything, it is the right of the individual, married or single, to be free from unwarranted governmental intrusion into matters so fundamentally affecting a person as the decision whether to bear or beget a child."
Stare decisis analysis The plurality's opinion included a thorough discussion on the doctrine of
stare decisis (respect of precedent), and provided a clear explanation for why the doctrine had to be applied in
Casey with regards to
Roe. The authors of the plurality opinion emphasized that
stare decisis had to apply in
Casey because the
Roe rule had not been proven intolerable; the rule had become subject "to a kind of reliance that would lend a special hardship to the consequences of overruling and add inequity to the cost of repudiation"; the law had not developed in such a way around the rule that left the rule "no more than a remnant of abandoned doctrine"; and the facts had not changed, nor viewed differently, to "rob the old rule of significant application or justification." The plurality acknowledged that it was important for the Court to stand by prior decisions, even those decisions some found unpopular, unless there was a change in the fundamental reasoning underpinning the previous decision. The authors of the plurality opinion, making a special note of the precedential value of
Roe v. Wade, and specifically how women's lives were changed by that decision, stated, The sum of the precedential enquiry to this point shows Roe's underpinnings unweakened in any way affecting its central holding. While it has engendered disapproval, it has not been unworkable. An entire generation has come of age free to assume Roe's concept of liberty in defining the capacity of women to act in society, and to make reproductive decisions; no erosion of principle going to liberty or personal autonomy has left Roe's central holding a doctrinal remnant. The plurality went on to analyze past judgments refusing to apply the doctrine of stare decisis, such as
Brown v. Board of Education. There, the authors of the plurality opinion explained, society's rejection of the "Separate but Equal" concept was a legitimate reason for the
Brown v. Board of Education court's rejection of the
Plessy v. Ferguson doctrine. Emphasizing the lack of need to overrule the essential holding of
Roe, and the Court's need to not be seen as overruling a prior decision merely because the individual members of the Court had changed, the authors of the plurality opinion stated, Because neither the factual underpinnings of Roe's central holding nor our understanding of it has changed (and because no other indication of weakened precedent has been shown), the Court could not pretend to be reexamining the prior law with any justification beyond a present doctrinal disposition to come out differently from the Court of 1973. The plurality further emphasized that the Court would lack legitimacy if it frequently changed its Constitutional decisions, stating, The Court must take care to speak and act in ways that allow people to accept its decisions on the terms the Court claims for them, as grounded truly in principle, not as compromises with social and political pressures having, as such, no bearing on the principled choices that the Court is obliged to make. Since the O'Connor-Kennedy-Souter plurality overruled some portions of
Roe v. Wade despite its emphasis on
stare decisis, Chief Justice Rehnquist in dissent argued that this section was entirely
obiter dicta. All these opening sections were joined by Justices Blackmun and Stevens for the majority. The remainder of the decision did not command a majority, but at least two other Justices concurred in judgment on each of the remaining points.
Viability of the fetus Although it upheld the "essential holding" in
Roe, and recognized that women had some constitutional liberty to terminate their pregnancies, the O'Connor–Kennedy–Souter plurality overturned the
Roe trimester framework in favor of a
viability analysis. The
Roe trimester framework completely forbade states from regulating abortion during the first trimester of pregnancy, permitted regulations designed to protect a woman's health in the second trimester, and permitted prohibitions on abortion during the third trimester (when the fetus becomes viable) under the justification of fetal protection, and so long as the life or health of the mother was not at risk. The plurality found that continuing advancements in medical technology had proven that a fetus could be considered viable at 23 or 24 weeks rather than at the 28 weeks previously understood by the Court in
Roe. Under this new fetus viability framework, the plurality held that at the point of viability and subsequent to viability, the state could promote its interest in the "potentiality of human life" by regulating, or possibly proscribing, abortion "except where it is necessary, in appropriate medical judgment, for the preservation of the life or health of the mother." Prior to fetus viability, the plurality held, the State can show concern for fetal development, but it cannot pose an undue burden on a woman's fundamental right to abortion. The plurality reasoned that the new pre- and post-viability line would still uphold the essential holding of
Roe, which recognized both the woman's constitutionally protected liberty, and the State's "important and legitimate interest in potential life."
Undue burden standard was one of the three authors of the "undue burden" standard that she first advocated for in earlier abortion rulings. In replacing the trimester framework with the viability framework, the plurality also replaced the strict scrutiny analysis under
Roe, with the "undue burden" standard previously developed by O'Connor in her dissent in
Akron v. Akron Center for Reproductive Health. According to the dissenters in
Akron, the undue burden standard had been the governing rule in Roe's first decade. A legal restriction posing an undue burden is one that has "the purpose or effect of placing a substantial obstacle in the path of a woman seeking an abortion of a nonviable fetus." An undue burden is found even where a statute purports to further the interest of potential life or another valid state interest, if it places a substantial obstacle in the path of access to abortion. The Supreme Court further clarified in the 2020
June Medical Services, LLC v. Russo opinion written by Justice
Stephen Breyer with respect to the undue burden standard: "[T]his standard requires courts independently to review the legislative findings upon which an abortion-related statute rests and to weigh the law's "asserted benefits against the burdens" it imposes on abortion access. 579 U.S., at ___(slip op., at 21) (citing
Gonzales v. Carhart, 550 U. S. 124, 165 (2007))." In ''
Whole Woman's Health v. Hellerstedt'' the court described the undue burden standard in its overall context with these words: In applying the new undue burden standard, the plurality overruled
City of Akron v. Akron Center for Reproductive Health, 462 U.S. 416 (1983) and
Thornburgh v. American College of Obstetricians and Gynecologists, 476 U.S. 747 (1986), each of which applied "
strict scrutiny" to abortion restrictions. Applying this new standard to the challenged Pennsylvania Act, the plurality struck down the spousal notice requirement, finding that for many women, the statutory provision would impose a substantial obstacle in their path to receive an abortion. The plurality recognized that the provision gave too much power to husbands over their wives ("a spousal notice requirement enables the husband to wield an effective veto over his wife's decision"), and could worsen situations of spousal and child abuse. In finding the provision unconstitutional, the authors of the plurality opinion clarified that the focus of the undue burden test is on the group "for whom the law is a restriction, not the group for whom the law is irrelevant." Otherwise stated, courts should not focus on what portion of the population is affected by the legislation, but rather on the population the law would restrict. The plurality upheld the remaining contested regulations – the State's informed consent and 24-hour waiting period, parental consent requirements, reporting requirements, and the "medical emergencies" definition – holding that none constituted an undue burden. Notably, when the authors of the plurality discuss the right to privacy in the joint opinion, it is all within the context of a quotation or paraphrase from
Roe or other previous cases. The authors of the plurality opinion do not, however, explicitly or implicitly state that they do not believe in a right to privacy, or that they do not support the use of privacy in
Roe to justify the fundamental right to abortion. Justice Blackmun would not agree with an implication asserting otherwise, stating "[t]he Court today reaffirms the long recognized rights of privacy and bodily integrity."
Key judgment Chief Justice
John Roberts's concurrence in the 2020
June Medical Services, LLC v. Russo case noted the key outcomes in
Casey: "The several restrictions that did not impose a substantial obstacle were constitutional, while the restriction that did impose a substantial obstacle was unconstitutional." Before an abortion regulation can be struck down as unconstitutional there must be a determination that this regulation imposes a substantial obstacle in light of
the undue burden standard explained in the section above. In
Casey "the justices imposed a new standard to determine the validity of laws restricting abortions. The new standard asks whether a state abortion regulation has the purpose or effect of imposing an "undue burden", which is defined as a "substantial obstacle in the path of a woman seeking an abortion before the fetus attains viability." The key judgment of
Casey can be summed up as follows: "Under
Casey, abortion regulations are valid so long as they do not pose a substantial obstacle and meet the threshold requirement of being "reasonably related" to a "legitimate purpose."
Id., at 878;
id., at 882 (joint opinion)."
Concurrence/dissents Justices Harry Blackmun and John Paul Stevens, who both joined the plurality in part, also each filed opinions
concurring in the Court's judgment in part and dissenting in part. Chief Justice William Rehnquist filed an opinion concurring in the Court's judgment in part and dissenting in part, which was joined by Justices Byron White, Antonin Scalia, and Clarence Thomas, none of whom joined any part of the plurality. Justice Scalia also filed an opinion concurring in the judgment in part and dissenting in part, which was also joined by Rehnquist, White, and Thomas.
Rehnquist and Scalia, joined by White and Thomas was the senior justice of the four that dissented against the upholding of
Roe. Rehnquist and Scalia each joined the plurality in upholding the parental consent, informed consent, and waiting period laws. However, they dissented from the plurality's decision to uphold
Roe v. Wade and strike down the spousal notification law, contending that
Roe was incorrectly decided. In his opinion, Chief Justice Rehnquist questioned the fundamental right to an abortion, the "right to privacy", and the strict scrutiny application in
Roe. He also questioned the new "undue burden" analysis under the plurality opinion, instead deciding that the proper analysis for the regulation of abortions was rational-basis. In his opinion, Justice Scalia also argued for a rational-basis approach, finding that the Pennsylvania statute in its entirety was constitutional. He argued that abortion was not a "protected" liberty, and as such, the abortion liberty could be intruded upon by the State. To this end, Justice Scalia concluded this was so because an abortion right was not in the Constitution, and "longstanding traditions of American society" have allowed abortion to be legally proscribed. Rehnquist and Scalia joined each other's concurrence/dissents. White and Thomas, who did not write their own opinions, joined in both.
Stevens and Blackmun , the original author of
Roe, would have struck down all of the Pennsylvania abortion restrictions, continuing to apply
strict scrutiny. Justices Blackmun and Stevens wrote opinions in which they approved of the plurality's preservation of
Roe and rejection of the spousal notification law. They did not agree with the plurality's decision to uphold the other three laws at issue. Justice Stevens concurred in part and dissented in part. Justice Stevens joined the plurality's preservation of
Roe and rejection of the spousal notification law, but under his interpretation of the undue burden standard ("[a] burden may be 'undue' either because the burden is too severe or because it lacks a legitimate rational justification"), he would have found the information requirements in §§ 3205(a)(2)(i)–(iii) and § 3205(a)(1)(ii), and the 24-hour waiting period in §§ 3205(a)(1)–(2) unconstitutional. Instead of applying an undue burden analysis, Justice Stevens would have preferred to apply the analyses in
Akron and
Thornburgh, two cases that had applied a strict scrutiny analysis, to reach the same conclusions. Justice Stevens also placed great emphasis on the fact that women had a right to bodily integrity, and a constitutionally protected liberty interest to decide matters of the "highest privacy and the most personal nature." As such, Justice Stevens felt that a State should not be permitted to attempt to "persuade the woman to choose childbirth over abortion"; he felt this was too coercive and violated the woman's decisional autonomy. Justice Blackmun concurred in part, concurred in the judgment in part, and dissented in part. He joined the plurality's preservation of
Roe – of which he wrote the majority – and he, too, rejected the spousal notification law. Justice Blackmun, however, argued for a woman's right to privacy and insisted, as he did in
Roe, that all non-
de-minimis abortion regulations were subject to strict scrutiny. Using such an analysis, Justice Blackmun argued that the content-based counseling, the 24-hour waiting period, informed parental consent, and the reporting regulations were unconstitutional. He also dissented from the plurality's undue burden test, and instead found his trimester framework "administrable" and "far less manipulable". Blackmun even went further in his opinion than Stevens, sharply attacking and criticizing the anti-
Roe bloc of the Court. ==Supreme Court's holdings overturned==