title: First report: prenatal diagnosis of a true knot.
authors.forename: J H
authors.initials: JH
authors.lastname: Collins
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D010922:Placenta Diseases / Q000000981:diagnostic imaging*; D011247:Pregnancy; D014102:Torsion Abnormality / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal