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Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact

This study investigated the effects of the herd, cow parity, the insemination protocol and season on the incidence of pregnancy loss (PL) in dairy herds. Furthermore, we determined the downstream effects of PL on reproductive performance and its economic impact. The overall incidence rate of PL was...

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Autores principales: Lee, Je-In, Kim, Ill-Hwa
Formato: Texto
Lenguaje:English
Publicado: The Korean Society of Veterinary Science 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2868136/
https://www.ncbi.nlm.nih.gov/pubmed/17679776
http://dx.doi.org/10.4142/jvs.2007.8.3.283
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author Lee, Je-In
Kim, Ill-Hwa
author_facet Lee, Je-In
Kim, Ill-Hwa
author_sort Lee, Je-In
collection PubMed
description This study investigated the effects of the herd, cow parity, the insemination protocol and season on the incidence of pregnancy loss (PL) in dairy herds. Furthermore, we determined the downstream effects of PL on reproductive performance and its economic impact. The overall incidence rate of PL was 6.9% in 1,001 pregnant cows and its incidence peaked (p < 0.01) during the second trimester of gestation. GLIMMIX analysis revealed that cow parity was the important risk factor for the PL. The odds ratio showed that the likelihood of PL in cows with parities of 1 or 2 was decreased by 0.6 or 0.5 fold compared to the cows with a parity of 3 or higher. Following PL, the mean rate of endometritis was 23.2% and endometritis was more common (p < 0.05) when PL occurred during the third trimester than during the first and second trimesters. The mean culling rate was 46.4% and this did not differ with the period of PL. The overall mean intervals from PL to the first service and conception were 63.4 and 101.8 days, respectively. The mean interval from PL to first service was longer (p < 0.01) for cows with PL during the third trimester than for the cows with PL during the first and second trimesters. The economic loss resulting from each PL was estimated at approximately $2,333, and this was largely due to an extended calving interval and increased culling. These results suggest that cow parity affects the incidence of PL, which extends calving interval and causes severe economic loss of dairy herds.
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spelling pubmed-28681362010-05-13 Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact Lee, Je-In Kim, Ill-Hwa J Vet Sci Original Article This study investigated the effects of the herd, cow parity, the insemination protocol and season on the incidence of pregnancy loss (PL) in dairy herds. Furthermore, we determined the downstream effects of PL on reproductive performance and its economic impact. The overall incidence rate of PL was 6.9% in 1,001 pregnant cows and its incidence peaked (p < 0.01) during the second trimester of gestation. GLIMMIX analysis revealed that cow parity was the important risk factor for the PL. The odds ratio showed that the likelihood of PL in cows with parities of 1 or 2 was decreased by 0.6 or 0.5 fold compared to the cows with a parity of 3 or higher. Following PL, the mean rate of endometritis was 23.2% and endometritis was more common (p < 0.05) when PL occurred during the third trimester than during the first and second trimesters. The mean culling rate was 46.4% and this did not differ with the period of PL. The overall mean intervals from PL to the first service and conception were 63.4 and 101.8 days, respectively. The mean interval from PL to first service was longer (p < 0.01) for cows with PL during the third trimester than for the cows with PL during the first and second trimesters. The economic loss resulting from each PL was estimated at approximately $2,333, and this was largely due to an extended calving interval and increased culling. These results suggest that cow parity affects the incidence of PL, which extends calving interval and causes severe economic loss of dairy herds. The Korean Society of Veterinary Science 2007-09 2007-09-30 /pmc/articles/PMC2868136/ /pubmed/17679776 http://dx.doi.org/10.4142/jvs.2007.8.3.283 Text en Copyright © 2007 The Korean Society of Veterinary Science https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0 (https://creativecommons.org/licenses/by-nc/4.0/) ) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Lee, Je-In
Kim, Ill-Hwa
Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
title Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
title_full Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
title_fullStr Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
title_full_unstemmed Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
title_short Pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
title_sort pregnancy loss in dairy cows: the contributing factors, the effects on reproductive performance and the economic impact
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2868136/
https://www.ncbi.nlm.nih.gov/pubmed/17679776
http://dx.doi.org/10.4142/jvs.2007.8.3.283
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AT kimillhwa pregnancylossindairycowsthecontributingfactorstheeffectsonreproductiveperformanceandtheeconomicimpact