1 Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-9032; Parkland Health, Dallas, TX. Electronic address: christina.herrera@utsouthwestern.edu.
2 Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX.
3 Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, University of Texas Southwestern Medical Center, Dallas, TX; Parkland Health, Dallas, TX.
4 Department of Obstetrics and Gynecology and Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX; Parkland Health, Dallas, TX.