Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy

The present study aimed to determine possible risk factors affecting reproductive performance, especially time taken to establish pregnancy in dairy cows, using Cox’s proportional hazard model. The data were collected from 154 Holstein Friesian cows (199 lactations). Cows diagnosed with a vaginal di...

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Autores principales: OKAWA, Hiroaki, GOTO, Akira, WIJAYAGUNAWARDANE, Missaka M.P., VOS, Peter L.A.M., YAMATO, Osamu, TANIGUCHI, Masayasu, TAKAGI, Mitsuhiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japanese Society of Veterinary Science 2018
Materias:
Theriogenology
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6361653/
https://www.ncbi.nlm.nih.gov/pubmed/30473578
http://dx.doi.org/10.1292/jvms.18-0259
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author OKAWA, Hiroaki
GOTO, Akira
WIJAYAGUNAWARDANE, Missaka M.P.
VOS, Peter L.A.M.
YAMATO, Osamu
TANIGUCHI, Masayasu
TAKAGI, Mitsuhiro
author_facet OKAWA, Hiroaki
GOTO, Akira
WIJAYAGUNAWARDANE, Missaka M.P.
VOS, Peter L.A.M.
YAMATO, Osamu
TANIGUCHI, Masayasu
TAKAGI, Mitsuhiro
author_sort OKAWA, Hiroaki
collection PubMed
description The present study aimed to determine possible risk factors affecting reproductive performance, especially time taken to establish pregnancy in dairy cows, using Cox’s proportional hazard model. The data were collected from 154 Holstein Friesian cows (199 lactations). Cows diagnosed with a vaginal discharge score (VDS) of one or calving abnormality showed significantly delayed pregnancy: hazard ratio (HR)=0.654 (95% confidence interval [CI]: 0.436–0.983; P=0.041) and HR=0.457 (95% CI: 0.270–0.774; P=0.004), respectively. Our study suggested that the occurrence of VDS of one or calving abnormality might be possible risk factors increasing the number of days open and affecting reproductive performance in dairy cows.
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spelling pubmed-63616532019-02-08 Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy OKAWA, Hiroaki GOTO, Akira WIJAYAGUNAWARDANE, Missaka M.P. VOS, Peter L.A.M. YAMATO, Osamu TANIGUCHI, Masayasu TAKAGI, Mitsuhiro J Vet Med Sci Theriogenology The present study aimed to determine possible risk factors affecting reproductive performance, especially time taken to establish pregnancy in dairy cows, using Cox’s proportional hazard model. The data were collected from 154 Holstein Friesian cows (199 lactations). Cows diagnosed with a vaginal discharge score (VDS) of one or calving abnormality showed significantly delayed pregnancy: hazard ratio (HR)=0.654 (95% confidence interval [CI]: 0.436–0.983; P=0.041) and HR=0.457 (95% CI: 0.270–0.774; P=0.004), respectively. Our study suggested that the occurrence of VDS of one or calving abnormality might be possible risk factors increasing the number of days open and affecting reproductive performance in dairy cows. The Japanese Society of Veterinary Science 2018-11-26 2019-01 /pmc/articles/PMC6361653/ /pubmed/30473578 http://dx.doi.org/10.1292/jvms.18-0259 Text en ©2019 The Japanese Society of Veterinary Science This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0: https://creativecommons.org/licenses/by-nc-nd/4.0/)
spellingShingle Theriogenology
OKAWA, Hiroaki
GOTO, Akira
WIJAYAGUNAWARDANE, Missaka M.P.
VOS, Peter L.A.M.
YAMATO, Osamu
TANIGUCHI, Masayasu
TAKAGI, Mitsuhiro
Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
title Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
title_full Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
title_fullStr Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
title_full_unstemmed Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
title_short Risk factors associated with reproductive performance in Japanese dairy cows: Vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
title_sort risk factors associated with reproductive performance in japanese dairy cows: vaginal discharge with flecks of pus or calving abnormality extend time to pregnancy
topic Theriogenology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6361653/
https://www.ncbi.nlm.nih.gov/pubmed/30473578
http://dx.doi.org/10.1292/jvms.18-0259
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