Amy Heerema-McKenney, MD is Director of Perinatal Pathology at the Robert J. Tomsich Pathology and Laboratory Medicine Institute, Division of Anatomic Pathology for Cleveland Clinic in Cleveland, Ohio Edwina J. Popek, DO, is Professor Emeritus of Pathology, Immunology and Pediatrics, Baylor College of Medicine, Texas Children's Hospital Pavilion for Women in Houston, Texas Monique De Paepe, MD, MSc is Professor of Pathology and Laboratory Medicine at Women and Infants Hospital, Alpert Medical School of Brown University in Providence, Rhode Island