Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.theriogenology.2020.08.022 http://hdl.handle.net/11449/209680 |
Resumo: | There are multiple factors that contribute to reduced fertility in lactating dairy cows. Recently, a reproductive tract size and position score (SPS) system was developed as a management tool to identify dairy cows with decreased fertility. The aim of this study was to evaluate the association between the SPS on fertility outcomes such as ovulation failure, pregnancy per artificial insemination (P/AI), concentration of pregnancy-associated glycoproteins (PAGs), and pregnancy loss in lactating dairy cows. Primiparous and multiparous lactating Holstein cows (n = 869) were enrolled at two locations. Location 1 (Loc. 1) in Minas Gerais, Brazil (n = 613) and location 2 (Loc. 2) in Agassiz, British Columbia, Canada (n = 256). At the time of AI (d 0), cows were classified as SPS (small [SPS1], medium [SPS2], or large [SPS3] sized reproductive tract) and ovulation failure was determined at 48 h and 7 d post-AI via ultrasonography (Loc. 2 only). Blood samples were collected on d 24 and 31 of gestation for quantification of PAGs and pregnancy diagnosis was performed via ultrasonography at d 31 and 60 post-AI (Loc. 1) and at d 31 +/- 3 and 60 +/- 3 post-AI (Loc. 2). Cows diagnosed pregnant at d 31 post-AI but not pregnant at d 60 were defined to have undergone late embryonic pregnancy loss. Parity was found to impact SPS (P < 0.01), as primiparous cows had a higher frequency of SPS1 and lower frequency of SPS3 when compared with multiparous cows (SPS1: 42.6 vs. 15.0%; SPS3: 7.0 vs. 22.0%, respectively). Cows classified as SPS3 had greater ovulation failure at 48 h (P = 0.04) and 7 d post-AI (P = 0.05). Cows classified as SPS1 had greater P/AI when compared to SPS2 and SPS3 (45.9 +/- 3.3 vs. 37.4 +/- 2.6 and 29.1 +/- 3.5%, respectively; P = 0.004). There was no interaction between parity and SPS on P/AI. Pregnancy loss between 31 and 60 d post-AI was increased in cows classified as SPS3 compared to SPS2 and SPS1 (24.3 +/- 0.05 vs. 11.6 +/- 0.02 and 9.4 +/- 0.02%, respectively; P = 0.04). Cows classified as SPS1 and SPS2 had greater concentrations of PAGs at 31 d post-AI when compared to SPS3 at both Loc.1 (P < 0.01) and Loc. 2 (P < 0.01). There was no interaction between SPS and pregnancy loss on PAGs at 24 and 31 d postAI for either Loc. 1 (P = 0.75 and P = 0.76, respectively) or Loc. 2 (P = 0.61 and P = 0.81, respectively). In conclusion, cows that were classified as SPS3 had greater ovulation failure, reduced P/AI, similar concentrations of PAG on d 24, but decreased on d 31, and a greater incidence of pregnancy loss. Thus, size and position of the reproductive tract is associated with fertility and this scoring system could be used to make reproductive management decisions on dairy operations. (C) 2020 Elsevier Inc. All rights reserved. |
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Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cowsDairy cattleReproductive tract size and position scoreFertilityPregnancy lossThere are multiple factors that contribute to reduced fertility in lactating dairy cows. Recently, a reproductive tract size and position score (SPS) system was developed as a management tool to identify dairy cows with decreased fertility. The aim of this study was to evaluate the association between the SPS on fertility outcomes such as ovulation failure, pregnancy per artificial insemination (P/AI), concentration of pregnancy-associated glycoproteins (PAGs), and pregnancy loss in lactating dairy cows. Primiparous and multiparous lactating Holstein cows (n = 869) were enrolled at two locations. Location 1 (Loc. 1) in Minas Gerais, Brazil (n = 613) and location 2 (Loc. 2) in Agassiz, British Columbia, Canada (n = 256). At the time of AI (d 0), cows were classified as SPS (small [SPS1], medium [SPS2], or large [SPS3] sized reproductive tract) and ovulation failure was determined at 48 h and 7 d post-AI via ultrasonography (Loc. 2 only). Blood samples were collected on d 24 and 31 of gestation for quantification of PAGs and pregnancy diagnosis was performed via ultrasonography at d 31 and 60 post-AI (Loc. 1) and at d 31 +/- 3 and 60 +/- 3 post-AI (Loc. 2). Cows diagnosed pregnant at d 31 post-AI but not pregnant at d 60 were defined to have undergone late embryonic pregnancy loss. Parity was found to impact SPS (P < 0.01), as primiparous cows had a higher frequency of SPS1 and lower frequency of SPS3 when compared with multiparous cows (SPS1: 42.6 vs. 15.0%; SPS3: 7.0 vs. 22.0%, respectively). Cows classified as SPS3 had greater ovulation failure at 48 h (P = 0.04) and 7 d post-AI (P = 0.05). Cows classified as SPS1 had greater P/AI when compared to SPS2 and SPS3 (45.9 +/- 3.3 vs. 37.4 +/- 2.6 and 29.1 +/- 3.5%, respectively; P = 0.004). There was no interaction between parity and SPS on P/AI. Pregnancy loss between 31 and 60 d post-AI was increased in cows classified as SPS3 compared to SPS2 and SPS1 (24.3 +/- 0.05 vs. 11.6 +/- 0.02 and 9.4 +/- 0.02%, respectively; P = 0.04). Cows classified as SPS1 and SPS2 had greater concentrations of PAGs at 31 d post-AI when compared to SPS3 at both Loc.1 (P < 0.01) and Loc. 2 (P < 0.01). There was no interaction between SPS and pregnancy loss on PAGs at 24 and 31 d postAI for either Loc. 1 (P = 0.75 and P = 0.76, respectively) or Loc. 2 (P = 0.61 and P = 0.81, respectively). In conclusion, cows that were classified as SPS3 had greater ovulation failure, reduced P/AI, similar concentrations of PAG on d 24, but decreased on d 31, and a greater incidence of pregnancy loss. Thus, size and position of the reproductive tract is associated with fertility and this scoring system could be used to make reproductive management decisions on dairy operations. (C) 2020 Elsevier Inc. All rights reserved.Dairy Research Cluster Initiative II (Dairy Farmers of Canada)Dairy Research Cluster Initiative II (Agriculture and Agri-Food Canada)Dairy Research Cluster Initiative II (Canadian Dairy Network)Dairy Research Cluster Initiative II (Canadian Dairy Commission; Ottawa, Canada)Natural Sciences and Engineering Research Council, Discovery Grant (Ottawa, Canada)USDA-NIFA Hatch/Multistate ProjectUniv British Columbia, Fac Land & Food Syst, Appl Anim Biol, Vancouver, BC V6T 1Z4, CanadaSao Paulo State Univ, Dept Anim Prod, BR-18168000 Botucatu, SP, BrazilUniv Tennessee, Dept Anim Sci, Knoxville, TN 37996 USATexas A&M Univ, Dept Anim Sci, Pregnancy & Dev Programming Area Excellence, College Stn, TX 77843 USASao Paulo State Univ, Dept Anim Prod, BR-18168000 Botucatu, SP, BrazilUSDA-NIFA Hatch/Multistate Project: W3112-TEX07702Elsevier B.V.Univ British ColumbiaUniversidade Estadual Paulista (Unesp)Univ TennesseeTexas A&M UnivMadureira, A. M. L.Poole, R. K.Burnett, T. A.Guida, T. G. [UNESP]Edwards, J. L.Schrick, F. N.Vasconcelos, J. L. M. [UNESP]Cerri, R. L. A.Pohler, K. G.2021-06-25T12:25:49Z2021-06-25T12:25:49Z2020-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article66-74http://dx.doi.org/10.1016/j.theriogenology.2020.08.022Theriogenology. New York: Elsevier Science Inc, v. 158, p. 66-74, 2020.0093-691Xhttp://hdl.handle.net/11449/20968010.1016/j.theriogenology.2020.08.022WOS:000591658500009Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengTheriogenologyinfo:eu-repo/semantics/openAccess2024-09-09T13:01:51Zoai:repositorio.unesp.br:11449/209680Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-09-09T13:01:51Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
title |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
spellingShingle |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows Madureira, A. M. L. Dairy cattle Reproductive tract size and position score Fertility Pregnancy loss |
title_short |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
title_full |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
title_fullStr |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
title_full_unstemmed |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
title_sort |
Size and position of the reproductive tract impacts fertility outcomes and pregnancy losses in lactating dairy cows |
author |
Madureira, A. M. L. |
author_facet |
Madureira, A. M. L. Poole, R. K. Burnett, T. A. Guida, T. G. [UNESP] Edwards, J. L. Schrick, F. N. Vasconcelos, J. L. M. [UNESP] Cerri, R. L. A. Pohler, K. G. |
author_role |
author |
author2 |
Poole, R. K. Burnett, T. A. Guida, T. G. [UNESP] Edwards, J. L. Schrick, F. N. Vasconcelos, J. L. M. [UNESP] Cerri, R. L. A. Pohler, K. G. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Univ British Columbia Universidade Estadual Paulista (Unesp) Univ Tennessee Texas A&M Univ |
dc.contributor.author.fl_str_mv |
Madureira, A. M. L. Poole, R. K. Burnett, T. A. Guida, T. G. [UNESP] Edwards, J. L. Schrick, F. N. Vasconcelos, J. L. M. [UNESP] Cerri, R. L. A. Pohler, K. G. |
dc.subject.por.fl_str_mv |
Dairy cattle Reproductive tract size and position score Fertility Pregnancy loss |
topic |
Dairy cattle Reproductive tract size and position score Fertility Pregnancy loss |
description |
There are multiple factors that contribute to reduced fertility in lactating dairy cows. Recently, a reproductive tract size and position score (SPS) system was developed as a management tool to identify dairy cows with decreased fertility. The aim of this study was to evaluate the association between the SPS on fertility outcomes such as ovulation failure, pregnancy per artificial insemination (P/AI), concentration of pregnancy-associated glycoproteins (PAGs), and pregnancy loss in lactating dairy cows. Primiparous and multiparous lactating Holstein cows (n = 869) were enrolled at two locations. Location 1 (Loc. 1) in Minas Gerais, Brazil (n = 613) and location 2 (Loc. 2) in Agassiz, British Columbia, Canada (n = 256). At the time of AI (d 0), cows were classified as SPS (small [SPS1], medium [SPS2], or large [SPS3] sized reproductive tract) and ovulation failure was determined at 48 h and 7 d post-AI via ultrasonography (Loc. 2 only). Blood samples were collected on d 24 and 31 of gestation for quantification of PAGs and pregnancy diagnosis was performed via ultrasonography at d 31 and 60 post-AI (Loc. 1) and at d 31 +/- 3 and 60 +/- 3 post-AI (Loc. 2). Cows diagnosed pregnant at d 31 post-AI but not pregnant at d 60 were defined to have undergone late embryonic pregnancy loss. Parity was found to impact SPS (P < 0.01), as primiparous cows had a higher frequency of SPS1 and lower frequency of SPS3 when compared with multiparous cows (SPS1: 42.6 vs. 15.0%; SPS3: 7.0 vs. 22.0%, respectively). Cows classified as SPS3 had greater ovulation failure at 48 h (P = 0.04) and 7 d post-AI (P = 0.05). Cows classified as SPS1 had greater P/AI when compared to SPS2 and SPS3 (45.9 +/- 3.3 vs. 37.4 +/- 2.6 and 29.1 +/- 3.5%, respectively; P = 0.004). There was no interaction between parity and SPS on P/AI. Pregnancy loss between 31 and 60 d post-AI was increased in cows classified as SPS3 compared to SPS2 and SPS1 (24.3 +/- 0.05 vs. 11.6 +/- 0.02 and 9.4 +/- 0.02%, respectively; P = 0.04). Cows classified as SPS1 and SPS2 had greater concentrations of PAGs at 31 d post-AI when compared to SPS3 at both Loc.1 (P < 0.01) and Loc. 2 (P < 0.01). There was no interaction between SPS and pregnancy loss on PAGs at 24 and 31 d postAI for either Loc. 1 (P = 0.75 and P = 0.76, respectively) or Loc. 2 (P = 0.61 and P = 0.81, respectively). In conclusion, cows that were classified as SPS3 had greater ovulation failure, reduced P/AI, similar concentrations of PAG on d 24, but decreased on d 31, and a greater incidence of pregnancy loss. Thus, size and position of the reproductive tract is associated with fertility and this scoring system could be used to make reproductive management decisions on dairy operations. (C) 2020 Elsevier Inc. All rights reserved. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-01 2021-06-25T12:25:49Z 2021-06-25T12:25:49Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.theriogenology.2020.08.022 Theriogenology. New York: Elsevier Science Inc, v. 158, p. 66-74, 2020. 0093-691X http://hdl.handle.net/11449/209680 10.1016/j.theriogenology.2020.08.022 WOS:000591658500009 |
url |
http://dx.doi.org/10.1016/j.theriogenology.2020.08.022 http://hdl.handle.net/11449/209680 |
identifier_str_mv |
Theriogenology. New York: Elsevier Science Inc, v. 158, p. 66-74, 2020. 0093-691X 10.1016/j.theriogenology.2020.08.022 WOS:000591658500009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Theriogenology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
66-74 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
repositoriounesp@unesp.br |
_version_ |
1813546612165705728 |