Massachusetts Medical Society
Since the Supreme Court's landmark 1973 abortion-rights decision in Roe v. Wade, the law has taken the lead in defining the contours of the continuing public debate over reproductive liberty. Ever since then, abortion opponents have tried to make abortion more burdensome by limiting Roe, and these continuing challenges are the reason there have been so many Supreme Court decisions about abortion, including the Court's 1992 decision in Planned Parenthood of Southeastern Pennsylvania v. Casey, which unexpectedly reaffirmed the core of Roe.
George J. Annas,
The Supreme Court and Abortion Rights
New England Journal of Medicine
Available at: https://scholarship.law.bu.edu/faculty_scholarship/1294