[Clinical and sonographic diagnosis of occiput posterior position: a prospective study of 350 deliveries].
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D002983:Clinical Competence; D005260:Female; D006801:Humans; D007746:Labor Presentation; D007744:Obstetric Labor Complications / Q000000981:diagnostic imaging*; D011247:Pregnancy; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal