Managing the dominant follicle in high-producing dairy cows
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , , , , , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/197404 |
Resumo: | Reduced reproductive efficiency has been reported in high-producing dairy cows. Sources of reproductive inefficiency include decreased expression of estrus, increased diameter of the ovulatory follicle and reduced fertility when cows are inseminated after estrus, increased incidence of double ovulation and twinning, and increased pregnancy loss. To overcome some of these inefficiencies, reproductive management programs have been developed that synchronize ovulation and enable effective timed artificial insemination (AI) of lactating dairy cows. Effective regulation of the corpus luteum (CL), follicles, and hormonal environment are critical for optimizing these programs. Recent programs, such as the 5-day CIDR program, Double-Ovsynch, G-6-G, and estradiol benzoate-CIDR programs were designed to more effectively control one or more physiological events. These events include synchronization of a new follicular wave at the beginning of the program, optimization of the circulating progesterone (P4) concentrations and duration of follicular dominance, optimized reductions in P4 and increases in circulating estradiol (E2) concentrations during the preovulatory period, and tightly synchronized ovulation of a follicle of optimal size and fertility for implementation of timed AI. The success of these programs has been remarkable, although there is substantial variability in effectiveness due to environmental, management, nutritional, genetic, and disease factors as well as potential variability in some aspects of reproductive physiology among commercial dairy farms. Future programs will optimize the reproductive physiology while simplifying the protocol implementation and also match specific reproductive management protocols to specific farms and even specific cows (for example primiparous vs. multiparous). |
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Managing the dominant follicle in high-producing dairy cowsReduced reproductive efficiency has been reported in high-producing dairy cows. Sources of reproductive inefficiency include decreased expression of estrus, increased diameter of the ovulatory follicle and reduced fertility when cows are inseminated after estrus, increased incidence of double ovulation and twinning, and increased pregnancy loss. To overcome some of these inefficiencies, reproductive management programs have been developed that synchronize ovulation and enable effective timed artificial insemination (AI) of lactating dairy cows. Effective regulation of the corpus luteum (CL), follicles, and hormonal environment are critical for optimizing these programs. Recent programs, such as the 5-day CIDR program, Double-Ovsynch, G-6-G, and estradiol benzoate-CIDR programs were designed to more effectively control one or more physiological events. These events include synchronization of a new follicular wave at the beginning of the program, optimization of the circulating progesterone (P4) concentrations and duration of follicular dominance, optimized reductions in P4 and increases in circulating estradiol (E2) concentrations during the preovulatory period, and tightly synchronized ovulation of a follicle of optimal size and fertility for implementation of timed AI. The success of these programs has been remarkable, although there is substantial variability in effectiveness due to environmental, management, nutritional, genetic, and disease factors as well as potential variability in some aspects of reproductive physiology among commercial dairy farms. Future programs will optimize the reproductive physiology while simplifying the protocol implementation and also match specific reproductive management protocols to specific farms and even specific cows (for example primiparous vs. multiparous).Univ Wisconsin, Dept Dairy Sci, Madison, WI 53706 USAUniv Sao Paulo, Dept Anim Sci, Sao Paulo, BrazilUniv Estadual Paulista, Dept Anim Prod, Sao Paulo, BrazilAccelerated Genet, Baraboo, WI USAUludag Univ, Dept Obstetr & Gynecol, Bursa, TurkeyCent Res Unit, Pathum Thani, ThailandAmerican Breeders Serv, De Forest, WI USAMichigan State Univ, Dept Anim Sci, E Lansing, MI USAUniv Estadual Paulista, Dept Anim Prod, Sao Paulo, BrazilNottingham Univ PressUniv WisconsinUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Accelerated GenetUludag UnivCent Res UnitAmerican Breeders ServMichigan State UnivWiltbank, M. C.Sartori, R.Vasconcelos, J. L. M. [UNESP]Nascimento, A. B.Souza, A. H.Cunha, A. P.Gumen, A.Sangsritavong, S.Guenther, J. N.Lopez, H.Pursley, J. R.Lucy, M. C.Pate, J. L.Smith, M. F.Spencer, T. E.2020-12-10T22:02:20Z2020-12-10T22:02:20Z2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject231-245Reproduction In Domestic Ruminants Vii. Nottingham: Nottingham Univ Press, v. 67, p. 231-245, 2010.2045-872Xhttp://hdl.handle.net/11449/197404WOS:000290717800018Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengReproduction In Domestic Ruminants Viiinfo:eu-repo/semantics/openAccess2021-10-23T12:24:03Zoai:repositorio.unesp.br:11449/197404Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T12:24:03Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Managing the dominant follicle in high-producing dairy cows |
title |
Managing the dominant follicle in high-producing dairy cows |
spellingShingle |
Managing the dominant follicle in high-producing dairy cows Wiltbank, M. C. |
title_short |
Managing the dominant follicle in high-producing dairy cows |
title_full |
Managing the dominant follicle in high-producing dairy cows |
title_fullStr |
Managing the dominant follicle in high-producing dairy cows |
title_full_unstemmed |
Managing the dominant follicle in high-producing dairy cows |
title_sort |
Managing the dominant follicle in high-producing dairy cows |
author |
Wiltbank, M. C. |
author_facet |
Wiltbank, M. C. Sartori, R. Vasconcelos, J. L. M. [UNESP] Nascimento, A. B. Souza, A. H. Cunha, A. P. Gumen, A. Sangsritavong, S. Guenther, J. N. Lopez, H. Pursley, J. R. Lucy, M. C. Pate, J. L. Smith, M. F. Spencer, T. E. |
author_role |
author |
author2 |
Sartori, R. Vasconcelos, J. L. M. [UNESP] Nascimento, A. B. Souza, A. H. Cunha, A. P. Gumen, A. Sangsritavong, S. Guenther, J. N. Lopez, H. Pursley, J. R. Lucy, M. C. Pate, J. L. Smith, M. F. Spencer, T. E. |
author2_role |
author author author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Univ Wisconsin Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) Accelerated Genet Uludag Univ Cent Res Unit American Breeders Serv Michigan State Univ |
dc.contributor.author.fl_str_mv |
Wiltbank, M. C. Sartori, R. Vasconcelos, J. L. M. [UNESP] Nascimento, A. B. Souza, A. H. Cunha, A. P. Gumen, A. Sangsritavong, S. Guenther, J. N. Lopez, H. Pursley, J. R. Lucy, M. C. Pate, J. L. Smith, M. F. Spencer, T. E. |
description |
Reduced reproductive efficiency has been reported in high-producing dairy cows. Sources of reproductive inefficiency include decreased expression of estrus, increased diameter of the ovulatory follicle and reduced fertility when cows are inseminated after estrus, increased incidence of double ovulation and twinning, and increased pregnancy loss. To overcome some of these inefficiencies, reproductive management programs have been developed that synchronize ovulation and enable effective timed artificial insemination (AI) of lactating dairy cows. Effective regulation of the corpus luteum (CL), follicles, and hormonal environment are critical for optimizing these programs. Recent programs, such as the 5-day CIDR program, Double-Ovsynch, G-6-G, and estradiol benzoate-CIDR programs were designed to more effectively control one or more physiological events. These events include synchronization of a new follicular wave at the beginning of the program, optimization of the circulating progesterone (P4) concentrations and duration of follicular dominance, optimized reductions in P4 and increases in circulating estradiol (E2) concentrations during the preovulatory period, and tightly synchronized ovulation of a follicle of optimal size and fertility for implementation of timed AI. The success of these programs has been remarkable, although there is substantial variability in effectiveness due to environmental, management, nutritional, genetic, and disease factors as well as potential variability in some aspects of reproductive physiology among commercial dairy farms. Future programs will optimize the reproductive physiology while simplifying the protocol implementation and also match specific reproductive management protocols to specific farms and even specific cows (for example primiparous vs. multiparous). |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 2020-12-10T22:02:20Z 2020-12-10T22:02:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Reproduction In Domestic Ruminants Vii. Nottingham: Nottingham Univ Press, v. 67, p. 231-245, 2010. 2045-872X http://hdl.handle.net/11449/197404 WOS:000290717800018 |
identifier_str_mv |
Reproduction In Domestic Ruminants Vii. Nottingham: Nottingham Univ Press, v. 67, p. 231-245, 2010. 2045-872X WOS:000290717800018 |
url |
http://hdl.handle.net/11449/197404 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Reproduction In Domestic Ruminants Vii |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
231-245 |
dc.publisher.none.fl_str_mv |
Nottingham Univ Press |
publisher.none.fl_str_mv |
Nottingham Univ Press |
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 |
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