title: Ultrasound diagnosis of the hyperextended head in breech presentation.
abstract: Hyperextension of the fetal head in the breech presentation can be diagnosed by ultrasound. Straightening of the fetal spine and the widest diameter of the skull posterior to the long axis of the spine is diagnostic. Face presentation should also be diagnosable by these criteria.
mesh_terms: D000328:Adult; D001946:Breech Presentation; D005260:Female; D006257:Head; D006801:Humans; D007231:Infant, Newborn; D007746:Labor Presentation; D008297:Male; D007744:Obstetric Labor Complications / Q000175:diagnosis*; D011187:Posture; D011247:Pregnancy; D014463:Ultrasonography