University of Tehran Press Journal of Veterinary Research 2008-2525 54 3 1999 05 22 - - 16378 FA Journal Article 1970 01 01 An Oldenberg mare with infertility was refered to Faculty of Vetennay Medicine Teaching Hospital. Clinical and sonografic examinations, and uterine swab was performed. Evaluation of clinical findings revealed ovarian granulosa tumor and confirmed histopathologically after ovariectomy via flank. This is the first report of ovarian granulosa cell tumor in the mare in Iran. An Oldenberg mare with infertility was refered to Faculty of Vetennay Medicine Teaching Hospital. Clinical and sonografic examinations, and uterine swab was performed. Evaluation of clinical findings revealed ovarian granulosa tumor and confirmed histopathologically after ovariectomy via flank. This is the first report of ovarian granulosa cell tumor in the mare in Iran. https://jvr.ut.ac.ir/article_16378_8c9844d58f12b96b5f1e2be9de9da1c4.pdf