title: The swing of the pendulum.
authors.forename: T D
authors.initials: TD
authors.lastname: Allen
mesh_terms: D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging; D006801:Humans; D006869:Hydronephrosis / Q000151:congenital / Q000000981:diagnostic imaging / Q000601:surgery; D007231:Infant, Newborn; D011247:Pregnancy; D016216:Ultrasonography, Prenatal; D014517:Ureteral Obstruction / Q000151:congenital / Q000000981:diagnostic imaging* / Q000601:surgery