Early in production of this edition, our Williams family lost a dedicated member of the team in Ms. Kristin Landon. We knew her as our valued copyeditor for many editions of both William Obstetrics and Williams Gynecology. However, Kristin’s life was multifaceted, with talents that included analytic chemist, musician, cooking enthusiast, and writer. Indeed, her published science fiction novels include the Hidden Worlds trilogy and Windhome. We knew Kristin as an integral member of our textbook team. Her precision added clarity to our efforts and made our textbooks better.