PubMed This link opens in a new windowPubMed is maintained by the National Center for Biotechnology Information and the National Library of Medicine and conatins more than 35 million citations for biomedical literature from MEDLINE, life science journals, and online books. Its primary focus is biomedicine and health sciences, but it also includes related fields such as life sciences, behavioral sciences, chemical sciences, and bioengineering. PubMed is updated daily with citations for the latest published research.