Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows

Detalhes bibliográficos
Autor(a) principal: Andrade, L.P.
Data de Publicação: 1996
Outros Autores: Rhind, S.M., Wright, I.A., McMillen, S.R., Goddard, P.J., Bramley, T.A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.11/1826
Resumo: Full text not available. Only the abstract. DOI: 10.1071/RD9960951
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spelling Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cowsBeef cattleOvarian functionPostpartumFull text not available. Only the abstract. DOI: 10.1071/RD9960951The effects of bovine somatotrophin (bST) on ovarian follicle development and function and associated gonadotrophin profiles during the first nine weeks post partum were investigated in beef cows. Thirty-two cows (Shorthorn x Galloway) in moderately low body condition (BC) at calving were fed to maintain BC thereafter. At Weeks 2, 4, 6 and 8 post partum, animals were injected with 320 mg bovine somatotrophin (bST) (T, treated; n = 17) or with the carrier oil only (C, control; n = 15). Ovulation occurred in 4 of 17 T cows and 0 of 15 C cows (P = 0.10) by nine week post partum. Treatment with bST did not affect the numbers of small (3-8 mm in diameter) or large (> 8 mm in diameter) follicles or the granulosa cell populations but enhanced the oestradiol (P < 0.05) and insulin-like growth factor-I (IGF-I) content (P < 0.01) of large follicles by nine weeks post partum. It did not significantly affect the testosterone concentrations of large follicles. Circulating concentrations of growth hormone (GH) and IGF-I were higher in T cows than in C cows (P < 0.001) but were unrelated to gonadotrophin profiles or gonadotrophin receptor concentrations in the follicles. At Week 8, plasma insulin concentrations were higher in T cows than in C cows both before (P < 0.05) and after (P < 0.05) glucose injection. It is concluded that GH may play an important role in mediating the effects of nutritional state on ovarian function during the post-partum period, possibly through alteration of intrafollicular IGF-I concentrations.CSIRORepositório Científico do Instituto Politécnico de Castelo BrancoAndrade, L.P.Rhind, S.M.Wright, I.A.McMillen, S.R.Goddard, P.J.Bramley, T.A.2013-05-29T15:50:48Z19961996-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.11/1826engANDRADE, L.P. [et al.] (1996) - Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows. Reproduction, Fertility and Development. 8:6, p. 951-960.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-30T01:48:58Zoai:repositorio.ipcb.pt:10400.11/1826Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:33:14.063501Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
title Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
spellingShingle Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
Andrade, L.P.
Beef cattle
Ovarian function
Postpartum
title_short Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
title_full Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
title_fullStr Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
title_full_unstemmed Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
title_sort Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows
author Andrade, L.P.
author_facet Andrade, L.P.
Rhind, S.M.
Wright, I.A.
McMillen, S.R.
Goddard, P.J.
Bramley, T.A.
author_role author
author2 Rhind, S.M.
Wright, I.A.
McMillen, S.R.
Goddard, P.J.
Bramley, T.A.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico de Castelo Branco
dc.contributor.author.fl_str_mv Andrade, L.P.
Rhind, S.M.
Wright, I.A.
McMillen, S.R.
Goddard, P.J.
Bramley, T.A.
dc.subject.por.fl_str_mv Beef cattle
Ovarian function
Postpartum
topic Beef cattle
Ovarian function
Postpartum
description Full text not available. Only the abstract. DOI: 10.1071/RD9960951
publishDate 1996
dc.date.none.fl_str_mv 1996
1996-01-01T00:00:00Z
2013-05-29T15:50:48Z
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://hdl.handle.net/10400.11/1826
url http://hdl.handle.net/10400.11/1826
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv ANDRADE, L.P. [et al.] (1996) - Effects of bovine somatotrophin (bST) on ovarian function in post-partum beef cows. Reproduction, Fertility and Development. 8:6, p. 951-960.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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