For PubMed specifically, here is a search string using Medical Subject Headings, or MeSH, that you can use to turn up relevant articles on feminist bioethics:
(feminism [mh] AND (empathy [mh] OR ethics [mh:noexp] OR ethics, professional [mh] OR ethics, medical [mh] OR bioethics))
Investigate other MeSH terms to help you research your specific topic.
Many thanks to the Bioethics Research Library at the Kennedy Institute of Ethics at Georgetown University for providing the above search string on their guide to Feminist Bioethics.
In any database, try some of the following terms. What other terms can you think of, based on the reading you have done so far?