"Of course Justice O'CONNOR was correct in her former view. The arbitrariness of the viability line is confirmed by the Court's inability to offer any justification for it beyond the conclusory assertion that it is only at that point that the unborn child's life "can in reason and all fairness" be thought to override the interests of the mother, ante, at ____. Precisely why is it that, at the magical second when machines currently in use (though not necessarily available to the particular woman) are able to keep an unborn child alive apart from its mother, the creature is suddenly able (under our Constitution) to be protected by law, whereas before that magical second it was not? That makes no more sense than according infants legal protection only after the point when they can feed themselves."