title: Prenatal observation of umbilical cord abnormalities: a triple knot and torsion of the umbilical cord.
abstract: Umbilical cord abnormalities can be observed with ultrasonography. Two cases are described where a triple knot and torsion of the umbilical cord are observed. These cases allow the elucidation of the mechanics of formation of a triknot and torsion abnormality.
authors.forename: J C
authors.initials: JC
authors.lastname: Collins
authors.forename: R J
authors.initials: RJ
authors.lastname: Muller
authors.forename: C L
authors.initials: CL
authors.lastname: Collins
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal; D014470:Umbilical Cord / Q000000981:diagnostic imaging*