Department of Radiology, University of Colorado School of Medicine, 12631 East 17th Avenue, MS 8200, Aurora, CO, 80045, USA

Chelsea S. Life, Sarah S. Milla & Jeffrey J. Tutman

Department of Pediatric Radiology, Children’s Hospital Colorado, 12631 East 17th Avenue, MS 8200, Aurora, CO, 80045, USA

Sarah S. Milla & Jeffrey J. Tutman

Section of Pediatric and Adolescent Gynecology, Children’s Hospital Colorado, Aurora, CO, USA

Veronica I. Alaniz & Patricia S. Huguelet

Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO, USA

Veronica I. Alaniz & Patricia S. Huguelet

C.S.L. assisted in chart review, drafted the initial manuscript, created the figures (including illustrating figures 3, 4, and 5), and revised and approved the final manuscript as submitted.

S.S.M. critically reviewed and revised the manuscript, and approved the final manuscript as submitted.

V.I.A. critically reviewed and revised the manuscript, and approved the final manuscript as submitted.

P.S.H. critically reviewed and revised the manuscript, and approved the final manuscript as submitted.

J.J.T. conceptualized and designed the project, performed chart review, critically reviewed and revised the manuscript, and approved the final manuscript as submitted.

Correspondence to Chelsea S. Life or Jeffrey J. Tutman.