Use of milk progesterone tests on repeat breeder cows

Ata A., Tosun I.

INDIAN VETERINARY JOURNAL, vol.82, no.6, pp.642-645, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 82 Issue: 6
  • Publication Date: 2005
  • Journal Name: INDIAN VETERINARY JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.642-645
  • Akdeniz University Affiliated: No

Abstract

The most prominent findings for repeat breeder cows (RBC) are prolonged duration of estrus, delayed peak of luteinizing hormone (LH), prolonged lifespan of preovulatory follicle, and late postovulatory rise in plasma progesterone (P-4) (Mann and Lamming, 2001). Use of milk P-4 assay for monitoring the reproductive status on dairy cows has a history of more than twenty years. Many studies have been carried out milk P-4 assays such as radioimmunoassay (RIA) or rapid progesterone tests (RPT, based on EIA) for early pregnancy diagnoses, estrus confirmation and even diagnose of reproductive disorders (Williams and Esslemont, 1993; Bajema and Hoffman, 1994). The objectives of the present study were to determine the rate of RBC at Burdur and to evaluate usefulness of the RIA and RPT as a diagnostic tool to survey some aspects of reproduction on RBC.