(Portland, OR) -- PETA is campaigning against Oregon Health & Science University. The animal rights organization wants the university's obstetrics and gynecology students to use surgery simulators instead of performing surgery on pigs during their training. PETA claims invasive procedures have been done on up to 48 live pigs at the school. The organization has a billboard up to encourage the practice to stop. The university says it will adopt non-animal trainings when they become scientifically approved.