title: Twin labour complicated by umbilical cord knotting.
abstract: We report a case of intrapartum distress of the first twin due to a knot in the umbilical cord. Cord blood flow is reduced according to Poiseuille's law as the knot tightens.
authors.affiliation: Department of Gynecology and Obstetrics, University of Graz, Austria.
authors.forename: N E
authors.initials: NE
authors.lastname: Adelwöhrer
authors.forename: W
authors.initials: W
authors.lastname: Walcher
authors.forename: W
authors.initials: W
authors.lastname: Hönigl
mesh_terms: D000328:Adult; D001238:Asphyxia Neonatorum / Q000175:diagnosis*; D015148:Cardiotocography; D002585:Cesarean Section; D005260:Female; D005323:Fetal Monitoring; D006801:Humans; D007231:Infant, Newborn; D007744:Obstetric Labor Complications / Q000175:diagnosis*; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins