title: To the Editor.
authors.affiliation: Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts USA.
authors.forename: Mary C
authors.initials: MC
authors.lastname: Frates
authors.affiliation: Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts USA.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Doubilet
authors.affiliation: Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts USA.
authors.forename: Carol B
authors.initials: CB
authors.lastname: Benson
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000000981:diagnostic imaging* / Q000628:therapy*; D014463:Ultrasonography