Ovid MedlineThis link opens in a new windowMEDLINE (Ovid) is Ovid's version of Medline, an international bibliographic database of over 4,500 biomedical journals. It covers the fields of medicine, nursing, dentistry, veterinary medicine, the health care system and the preclinical sciences from 1950 to the present. MEDLINE/PubMed does not index books or book chapters.