The world's first test-tube baby, Louise Joy Brown, turns 25 today. Twenty-five years ago, President Bush's bioethicist Leon Kass warned that in vitro fertilization would undermine "the idea of humanness and of our human life and the meaning of our embodiment and our relation to ancestors and descendants." Nonsense. Fortunately, over the past 25 years, nearly one million parents ignored Kass' dire warnings and used in vitro fertilization to have families that they would otherwise have missed. Happy Birthday Louise.