"Notably, neither the plurality nor JUSTICE O'CONNOR advances the now-familiar catch-phrase criticism of the Roe framework that, because the point of viability will recede with advances in medical technology, Roe "is clearly on a collision course with itself." See Akron, 462 U.S. at 462 U. S. 458 (dissenting opinion). This critique has no medical foundation. As the medical literature and the amicus briefs filed in this case conclusively demonstrate, "there is an anatomic threshold' for fetal viability of about 23-24 weeks of gestation." Brief for American Medical Association et al. as Amici Curiae 7. See also Brief for 167 Distinguished Scientists and Physicians, including 11 Nobel Laureates, as Amici Curiae 8-14. Prior to that time, the crucial organs are not sufficiently mature to provide the mutually sustaining functions that are prerequisite to extrauterine survival, or viability. Moreover, "no technology exists to bridge the development gap between the three-day embryo culture and the 24th week of gestation." Fetal Extrauterine Survivability, Report to the New York State Task Force on Life and the Law 3 (1988). Nor does the medical community believe that the development of any such technology is possible in the foreseeable future. Id. at 12. In other words, the threshold of fetal viability is, and will remain, no different from what it was at the time Roe was decided. Predictions to the contrary are pure science fiction. See Brief for A Group of American Law Professors as Amicus Curiae 23-25."