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Produced by the U.S. National Library of Medicine, the MEDLINE database is widely recognized as the premier source for bibliographic and abstract coverage of biomedical literature. MEDLINE provides information from the fields of medicine, nursing, dentistry, as well as coverage in the areas of allied health, biological and physical sciences, humanities and information science as they relate to medicine and health care, communication disorders, population biology, and reproductive biology. The database contains more than 25 million citations from 5,200 biomedical journals published in the United States and other countries.

It also includes In-Process & Other Non-Indexed Citations, which provide basic information and abstracts for newly published articles before they are indexed with MeSH headings. It also includes ePub Ahead of Print records for articles submitted to the National Library of Medicine before a journal issue’s publication.


Detailed search help is available from the vendor. From the top right of the OVID search screen, click on the "Help" icon. Instructions are provided on Basic and Advanced searching techniques. Also available from the main search are icons to limit searches to specific fields such as Journal, Author, and Title.

For help using these indexes see: How do I find an article on my topic?

User tools and features

Alert Service.

Dates covered

1946 - present.

Updating frequency



Indexes more than 5,200 biomedical journals and selected monographs of congresses and symposia.

Type of coverage

Indexing with citations and abstracts (included for more than 75% of the records).

Print counterpart or
related resources

Index Medicus, Index to Dental Literature, International Nursing Index

See also: MEDLINE (EBSCOhost).

Producer/content provider

National Library of Medicine

Vendor/electronic presentation provider


Supplementary Subject(s)