Primary sources are original, uninterpreted information. Scholars analyze primary sources in order to answer research questions. Examples of primary sources vary by discipline.
Examples in the humanities:
Examples in the social sciences:
Example in the sciences:
Because of the interdisciplinary nature of the bioethics field, you may find that you need to search for, analyze and interpret primary sources from humanistic, social scientific and scientific perspectives. What constitutes a primary source is highly contextual and depends on how you are using the source. Consult with a librarian or your professor when in doubt!
Here are some types and examples of primary sources that bioethicists commonly use:
Not sure where to start? Try browsing through these anthologies of primary sources:
Source Book in Bioethics by 
Medicine, Health, and Bioethics: Essential Primary Sources by 