Journalartikel

Jahr der Veröffentlichung: 2023

Seiten: 211-217

Zeitschrift: Tierärztliche Praxis Großtiere

Bandnummer: 51

Heftnummer: 04

ISSN: 1434-1220

eISSN: 2567-5834

DOI Link: https://doi.org/10.1055/a-2142-4111

Verlag: Schattauer

Abstract: 
Subject and Aim In the literature, various methods aiming for a promotion of uterine involution and ovarian function in post-partum dairy cattle have been described. Recently, successful use of equine choriongonadotropin (eCG) in this context has been repeatedly reported, while other studies have failed to demonstrate positive effects of eCG administration on puerperal involution in cows. Due to the contradictory results described in the literature, the aim of this field study was to verify whether the administration of eCG on day 10 post-partum exerts a positive effect on uterine involution, ovarian activity and fertility indices in Simmental cows.Material and methods In nine dairy farms, 205 Simmental cows were divided by lot into three groups: Group 1 animals received 500 I.U. eCG, group 2 received 50 mu g gonadorelin, and group 3 animals received 250 mg butafosfan and 125 mu g cyanocobalamin (control group). Treatment was administered on day 10 post-partum in each case. The animals were examined clinically and ultrasonographically on the 10th, 25th and 42nd day post-partum and the time to insemination and pregnancy were recorded. Group comparison with respect to the recorded parameters was initially performed without considering confounding factors by analysis of variance. In the second step, potential influencing variables (lactation, milk yield, change in backfat thickness, retentio secundarium and serverity of the obstetric intervention) were taken into account, as well as the combination of the random factors "farm" and "individual animal within the farm".Results The administration of eCG exhibited no significant effect on uterine involution, however, the cervical involution was influenced significantly. In the group of cows with eCG treatment, ovarian cysts were detected significantly more frequently on day 25 post-partum (p=0.04). This difference did not persist on the 42nd day post-partum. Neither voluntary waiting period nor the days open were significantly shortened by eCG administration. Lactation number showed a significant effect on uterine involution. Heifers exhibited more rapid involution by day 42 post-partum than cows.Conclusion Administration of eCG in Simmentaler cows at day 10 post-partum showed no positive effect.Clinical relevance The use of eCG in early puerperium to promote fertility in the cow should be avoided.

Harvard-Zitierstil: Hofer, A. and Wehrend, A. (2023) Influence of an eCG administration on puerperal involution and fertility in Simmentaler cows, Tierärztliche Praxis Großtiere, 51(04), pp. 211-217. https://doi.org/10.1055/a-2142-4111

APA-Zitierstil: Hofer, A., & Wehrend, A. (2023). Influence of an eCG administration on puerperal involution and fertility in Simmentaler cows. Tierärztliche Praxis Großtiere. 51(04), 211-217. https://doi.org/10.1055/a-2142-4111