Errol R Norwitz, MD, PhD, MBA, Professor of Obstetrics and Gynecology, Tufts Medical Center, Boston, MA, USAGeorge A Saade, MD, Professor of Maternal-Fetal Medicine, University of Texas Medical Branch, Galveston, TX, USAHugh S Miller, MD, Department of Obstetrics and Gynecology, University of Arizona Medical Centre, Tucson, AZ, USAChristina M Davidson, MD, Assistant Professor of Maternal Fetal Medicine, Baylor College of Medicine, Houston, TX, USA