The boundaries of the "case and controversy" clause are open to dispute. For instance, the Court has held that where the controversy between parties has ceased because of a change in facts, it has no jurisdiction. However, where the case or controversy ceases—or, in legal terms, is "mooted"—after a case is filed, the Court may render a decision in the interest of justice. In "Roe v. Wade", for instance, the Court applied the mootness exception for cases "capable of repetition, yet evading review." Justice Harry Blackmun wrote that due to the natural limitation of the human gestation period, issues concerning pregnancy will always come to term before the appellate process is complete. "Roe v. Wade" 410 U.S. 113 (1973). Therefore, the Supreme Court could rule on the constitutionality of an abortion law despite the issue being moot at the time of adjudication.