Case files. / Eugene C. Toy, MD, Vice Chair of Academic Affairs and Residency Program Director, Obstetrics and Gynecology, The Methodist Hospital, Houston, Clinical Professor and Clerkship Director, Department of Obstetrics/Gynecology, University of Texas Medical School at Houston, Houston, Texas, John S. Dunn, Senior Academic Chair, Department of Obstetrics and Gynecology, St. Joseph Medical Center, Houston, Texas, William E. Seifert Jr., PhD, Adjunct Associate Professor, McGovern Center for Humanities and Ethics, Former Medical Biochemistry Course, Director, University of Texas Medical School at Houston, Houston, Texas, Henry W. Strobel, PhD, Professor, Department of Biochemistry and Molecular Biology, Distinguished Teaching Professor, Associate Dean for Faculty Affairs, University of Texas Medical School at Houston, Houston, Texas, Konrad P. Harms, MD, Clinical Assistant Professor, Weill Cornell College of Medicine, Associate Program Director, Obstetrics and Gynecology Residency, The Methodist Hospital, Houston, Houston, Texas.