Creasy and Resnik's maternal-fetal medicine : principles and practice / editors, Robert K. Creasy, MD, Professor Emeritus, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Texas Medical School at Houston, Houston, Texas, Corte Madera, California, Robert Resnik, MD, Professor and Chair Emeritus, Professor of Reproductive Medicine, University of California, San Diego, School of Medicine, La Jolla, California, Jay D. Iams, MD, Frederick P. Zuspan Professor and Endowed Chair, Division of Maternal-Fetal Medicine, Vice Chair, Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio, Charles J. Lockwood, MD, MHCM, Dean, College of Medicine, Professor of Obstetrics and Gynecology, Leslie H. and Abigail S. Wexner Dean's Chair in Medicine, Vice President for Health Science, The Ohio State University, Columbus, Ohio, Thomas R. Moore, MD, Professor and Chairman, Department of Reproductive Medicine, University of California, San Diego, School of Medicine, La Jolla, California, Michael F. Greene, MD, Director of Obstetrics, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital, Professor of Obstetrics, Gynecology, and Reproductive Biology, Harvard Medical School, Boston, Massachusetts.