Has anyone else noticed that Hilary Rosen, Mary Matalin, and Karen Hughes have all resigned to spend more time with their families?

Does this mark a trend of high-ranking and high-profile professional and/or political women quitting their jobs to actually devote more time to their kids? Or is it a strategic move to avoid harsh inquiry on their actual motives in resigning? Who can fault a woman who wants to cozy up with her family?