title: Intrapartum sonography sign for occiput posterior asynclitism diagnosis.
authors.forename: Antonio
authors.initials: A
authors.lastname: Malvasi
authors.forename: Andrea
authors.initials: A
authors.lastname: Tinelli
authors.forename: Michael
authors.initials: M
authors.lastname: Stark
mesh_terms: D036861:Delivery, Obstetric; D005145:Face; D005260:Female; D006801:Humans; D007746:Labor Presentation; D008954:Models, Biological; D010294:Parietal Bone; D036801:Parturition / Q000502:physiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000000981:diagnostic imaging*; D016216:Ultrasonography, Prenatal / Q000379:methods*