Nuchal encirclement by the umbilical cord.
D000138:Acidosis / Q000175:diagnosis; D001769:Blood; D001919:Bradycardia / Q000503:physiopathology; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis / Q000503:physiopathology*; D005318:Fetal Heart / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D006863:Hydrogen-Ion Concentration; D000860:Hypoxia / Q000175:diagnosis; D007231:Infant, Newborn; D007744:Obstetric Labor Complications / Q000175:diagnosis; D010808:Physical Examination; D011247:Pregnancy; D013223:Statistics as Topic; D014470:Umbilical Cord / Q000503:physiopathology*