This document discusses ethics in research involving human subjects. It summarizes key landmark documents that guide ethical research, including the Nuremberg Code, Helsinki Declaration, and Belmont Report. It also describes the role and responsibilities of Institutional Review Boards (IRBs) in reviewing research proposals, ensuring risks are minimized and subjects' rights are protected, and providing ongoing oversight of approved studies. IRBs are responsible for ethical and scientific review of research and have authority to approve, require modifications to, or disapprove research.