title: Transperineal versus transvaginal sonography during pregnancy.
authors.forename: Mario
authors.initials: M
authors.lastname: Zilianti
mesh_terms: D002584:Cervix Uteri / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D010502:Perineum / Q000000981:diagnostic imaging*; D011247:Pregnancy; D014463:Ultrasonography; D014621:Vagina / Q000000981:diagnostic imaging*