Optimization of the Estrus Synchronization Method and its Effect on Bulk

Abstract

Effect of various estrus synchronization methods on bulk tank milk somatic cell count (BTMSCC) was investigated. One-hundred Simmental cows within a single dairy farm were randomized into four equal groups: no treatment (Group 1, control group); application of a progesterone-releasing intravaginal device (Group 2); administration of double-dose prostaglandin F-2 alpha (PGF(2)-alpha) with an 11-day interval (Group 3); and subjected to the Ovsynch protocol (Group 4). Bulk tank milk (BTM) samples were collected daily for one month and BTMSCCs calculated. Progesterone and estradiol concentrations were also measured at 3-day intervals. BTMSCC of the Ovsynch protocol group was not significantly different from that of the control group, suggestive of good udder health. Based on this finding, we propose that spontaneous estrus and the Ovsynch protocol are preferable methods for estrus synchronization than progesterone-releasing intravaginal device (PRID) and PGF(2)-alpha approaches. (C) 2017 Friends Science Publishers

C1 [Saat, Nevzat] Univ Balikesir, Fac Vet Med, Dept Obstet & Gynecol, TR-10100 Balikesir, Turkey.

[Risvanli, Ali] Firat Univ, Fac Vet Med, Dept Obstet & Gynecol, TR-23159 Elazig, Turkey.

[Seker, Ibrahim] Firat Univ, Fac Vet Med, Dept Zootechny, TR-23159 Elazig, Turkey.

[Kaygusuzoglu, Erdal] Univ Bingol, Fac Vet Med, Dept Obstet & Gynecol, TR-12100 Bingol, Turkey.

[Koseman, Abdurrahman] Univ Inonu, Akcadag Vocat Sch, Dept Crop & Anim Prod, TR-44100 Malatya, Turkey.