http://www.slate.com/articles/news_and_politics/jurisprudence/2015/10/sandra_day_o_connor_s_legacy_supreme_court_rulings_on_abortion_affirmative.html

For much of her tenure, Justice Sandra Day O’Connor was so central to Supreme Court decisions that a book about her is called Queen’s Court. Not infrequently, especially after Justice Lewis Powell retired in 1987 and she became the swing vote, the Queen wielded her scepter on behalf of women. In 1992, she was one of the three “centrist” justices who held the dike against the ever more vociferous campaign to reverse Roe v. Wade and leave women’s reproductive fates to the tender mercies of the 50 states. When her sister in law, Ruth Bader Ginsburg, joined her in 1993, they formed a tag team on cases involving women: Ginsburg moved the equality ball forward while O’Connor played defense against an assault on women’s rights that had started long before.