title: Vacuum extraction initiated during the first stage of labour.
mesh_terms: D000773:Anesthesia, Obstetrical; D001720:Birth Injuries; D002584:Cervix Uteri / Q000502:physiology; D004106:Dilatation; D005113:Extraction, Obstetrical; D005260:Female; D005313:Fetal Death; D006801:Humans; D007746:Labor Presentation; D007751:Labor, Induced; D009772:Obstetrical Forceps; D010298:Parity; D011247:Pregnancy; D014427:Twins