title: Comments on sequential use of instruments at operative vaginal delivery.
authors.forename: J O
authors.initials: JO
authors.lastname: Escamilla
mesh_terms: D036861:Delivery, Obstetric / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D006801:Humans; D011247:Pregnancy; D013525:Surgical Instruments; D014620:Vacuum Extraction, Obstetrical / Q000295:instrumentation*