title: Primitive presentation from the front.
authors.forename: J
authors.initials: J
authors.lastname: BAZAN
authors.forename: F A
authors.initials: FA
authors.lastname: URANGA IMAZ
authors.forename: J
authors.initials: J
authors.lastname: NIS SAN MILLAN
mesh_terms: D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy; D014937:Work
keywords: LABOR
vernacular_title: Presentación primitiva de frente.