"Normally, we require that an actual controversy exist at the time of appellate or certiori review, not simply at the time the action is begun. However, when the issue concerns the rights of pregnant women, the normal human gestation process (which lasts approximately 266 days) is likely to end before a case can be heard or decided by an appellate court. If we adopted the rule proposed by the State of Texas, few cases involving rights of pregnant women would be justiciable beyond the trial stage. Appellate review would effectively be denied. Moreover, although no particular pregnancy lasts as long as the normal appellate process, individual women often become pregnant more than once, and pregnancies are constantly occurring in the general population. Therefore the situation of a pregnant woman asserting her rights clearly falls into the long recognized category of cases “capable of repetition, yet evading review.” Southern Pacific Terminal Co. v. ICC, 219 U.S. 298, 515 (1911). See Moore v. Ogilvie, 394 U.S. 814, 816 (1969); Carroll v. President and Commissioners of Princess Anne, 393 U.S. 175, 178-79 (1968); United States v. W.T. Grant Co., 345 U.S. 629, 632-33 (1953). In such situations we hold that a litigant’s action is not moot. We therefore agree with the District Court that Jane Roe retained standing to bring this lawsuit, that her case still presents a justiciable controversy, and that the termination of her 1970 pregnancy has not rendered her case moot."