How do you take the measure of a woman's life at 50, when her generation--or at least its passionate front line--has broken all the rules? "There is no formula that I'm aware of for being a successful or fulfilled woman today," Hillary Rodham Clinton once said. "Perhaps it would be easier ... if we could be handed a pattern and cut it out, just as our mothers and grandmothers and foremothers were. But that is not the way it is today, and I'm glad it is not." On Oct. 26, Hillary turns 50, which is a birthday that compels almost any woman to step back and examine whether the drape and line of her life fit the woman she once dreamed of becoming. The cutting edge of female Baby Boomers, of whom Hillary is the most famous, approached adulthood with a wild, subversive earnestness. These women would change the world, have careers, build strong marriages, raise good children and keep their sense of humor. Hillary has been a beneficiary of these expectations, and as First Lady also their most conspicuous victim. Her Wellesley education and Yale law degree put her onstage the student speaker at her college commencement and later as one of the nation's "most influential" lawyers), but they also moved her to the side when her husband's Arkansas constituency chafed at her insistence on being called Ms. Rodham.