1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Utah Health, Salt Lake City
2. George Washington University Biostatistics Center, Washington, DC
3. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill
4. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Northwestern University, Chicago, Illinois
5. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston
6. Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland
7. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Pittsburgh, Pittsburgh, Pennsylvania
8. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Brown University, Providence, Rhode Island
9. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Texas Health Science Center at Houston, Children’s Memorial Hermann, Hospital, Houston
10. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Columbia University, New York, New York
11. MetroHealth Medical Center, Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Case Western Reserve University, Cleveland, Ohio
12. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Ohio State University, Columbus
13. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia
14. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Alabama at Birmingham
15. Department of Women’s Health, University of Texas at Austin
16. for the National Institute of Child Health and Human Development Maternal-Fetal Medicine Units (MFMU) Network