Timothy M. Crombleholme, MD, is professor of Surgery and Physiology at Texas Christian University School of Medicine and North Texas Health Science Center, and director of the Fetal Care Center of Dallas at Medical City Children's Hospital in Dallas, TX. Foong-Yen Lim, MD, is associate professor at the University of Cincinnati College of Medicine and surgical director of the Fetal Care Center of Cincinnati at Cincinnati Children's Hospital Medical Center, Cincinnati, OH. Jose L. Peiro, MD, PhD, is associate professor of Surgery at University of Cincinnati College of Medicine, and director of endoscopic fetal surgery in the Fetal Care Center of Cincinnati at Cincinnati Children's Hospital Medical Center, Cincinnati, OH. Lynn Simpson, MD, is chief of maternal fetal medicine and medical director at the Carmen and John Thain Center for Prenatal Pediatrics, and professor of Women's Health in the department of Obstetrics and Gynecology at Columbia University School of Medicine, CUMC/New York-Presbyterian Morgan Stanley Children's Hospital, New York, NY. Natalie E. Rintoul, MD, is associate professor of Clinical Pediatrics at Perelman School of Medicine at the University of Pennsylvania Children's Hospital of Philadelphia, PA.