Einfluss des einsatzes von PRID® post insemationem auf die trächtigkeitsraten bei wiederholt umrindernden Holstein-kühen

Translated title of the contribution: Effect of post-insemination supplementation with PRID® on pregnancy in repeat-breeder Holstein cows

A. Villarroel, A. Martino, Robert Bondurant, F. Dèletang, W. M. Sischo

Research output: Contribution to journalArticle

Abstract

Embryonic mortality contributes to repeat-breeding in dairy cows; luteal insufficiency is a known cause of embryonic mortality. The objective of this study was to assess the efficacy of supplementation with exogenous progesterone for 14 days on pregnancy maintenance in inseminated repeat-breeder dairy cows. On Day 5 after insemination, treated cows (n = 143) received a modified PRID® (i. e. without estradiol capsule), which was removed on Day 19. Control cows (n = 148) did not receive any treatment. Overall there was no effect of PRID® supplementation on pregnancy rates. However, when the study population was stratified by parity and stage of lactation, PRID® supplementation significantly improved pregnancy rate in first and second parity late lactation cows (risk ratio = 3.26; 95% CI 1.22, 8.69). Pregnancy rates did not differ between PRID®-treated cows with (n = 81) and without vaginitis. Control cows tended (p = 0.077) to have a higher proportion of abortions than PRID®-treated cows (7/50 versus 2/51, respectively). In conclusion, young late lactation repeat-breeder cows benefited from progesterone supplementation, in terms of maintaining pregnancy until traditional time of pregnancy diagnosis.

Translated title of the contributionEffect of post-insemination supplementation with PRID® on pregnancy in repeat-breeder Holstein cows
Original languageGerman
Pages (from-to)978-984
Number of pages7
JournalPraktische Tierarzt
Volume87
Issue number12
StatePublished - Dec 1 2006

Keywords

  • Dairy cattle
  • Post-insemination
  • Prid®
  • Progesterone supplementation
  • Repeat-breeder

ASJC Scopus subject areas

  • veterinary(all)

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