Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows

Autores
Rodriguez, Alejandro Martin; Lopez Valiente, Sebastian; Bilbao, María Guillermina; Bartolome, Julián Alberto; Pérez Wallace, Santiago; Maresca, Sebastian
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We hypothesized that suckling restriction with nose plates (NPs) during an 8-day progesterone, estradiol, and eCG-based synchronization protocol increases fertility. On Day -9, body condition score (BCS; 1–5 scale) and the presence of corpus luteum (CL) were assessed in 502 Hereford cows (35–80 d postpartum), which were randomly assigned to the NP (n = 266) or control group (n = 236). The synchronization protocol consisted of inserting a 0.5 g progesterone intravaginal device (IVD) and administering estradiol benzoate (2.0 mg) on Day -9, followed by IVD removal and the administration of 0.5 mg estradiol cypionate and 400 IU eCG on Day -1. In the NP group, NPs were fitted to calves on Day -9 and removed on Day -1. Cows were exposed to bull mating from Day 0 to 87. On Day -9, approximately 60% of cows did not have CL or had a low BCS (< 2.75). The NP group was associated (P ≤ 0.03) with higher blood glucose and lower serum NEFA concentrations on Day -1. Suckling restriction had no effect (P > 0.1) on follicular diameter on Day -1 (control = 12.4 ± 0.4 mm and NP = 13.1 ± 0.4 mm), pregnancy rate (PR) on Day 36 (control = 50.9% and NP = 44.7%), presence of CL in cows without confirmed pregnancy on Day 36, or overall PR on Day 132 (control = 94.1% and NP = 91.7%). Eight-day NP treatment had no effect (P > 0.1) on cow BCS, CL presence on Day 36, or calf body weight at weaning. Suckling restriction before IVD removal during an 8-day synchronization protocol did not improve fertility in multiparous beef cows.
EEA Cuenca del Salado
Fil: Rodriguez, Alejandro Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Rodriguez, Alejandro Martin. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Agronomía de Azul; Argentina
Fil: Lopez Valiente, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Bilbao, Guillermina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bilbao, Guillermina. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina
Fil: Bartolome, Julian. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina
Fil: Bartolome, Julian. World Wide Sires LTD; Estados Unidos
Fil: Pérez Wallace, Santiago. Syntex S.A.; Argentina
Fil: Maresca, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fuente
Tropical Animal Health and Production 58 : article number 33. (2026)
Materia
Ganado de Carne
Lactancia
Progesterona
Sincronización
Gestación
Beef Cattle
Bos taurus
Suckling
Progesterone
Estradiol
Synchronization
Pregnancy
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/27043
Acceder
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oai_identifier_str oai:localhost:20.500.12123/27043
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cowsRodriguez, Alejandro MartinLopez Valiente, SebastianBilbao, María GuillerminaBartolome, Julián AlbertoPérez Wallace, SantiagoMaresca, SebastianGanado de CarneLactanciaProgesteronaSincronizaciónGestaciónBeef CattleBos taurusSucklingProgesteroneEstradiolSynchronizationPregnancyWe hypothesized that suckling restriction with nose plates (NPs) during an 8-day progesterone, estradiol, and eCG-based synchronization protocol increases fertility. On Day -9, body condition score (BCS; 1–5 scale) and the presence of corpus luteum (CL) were assessed in 502 Hereford cows (35–80 d postpartum), which were randomly assigned to the NP (n = 266) or control group (n = 236). The synchronization protocol consisted of inserting a 0.5 g progesterone intravaginal device (IVD) and administering estradiol benzoate (2.0 mg) on Day -9, followed by IVD removal and the administration of 0.5 mg estradiol cypionate and 400 IU eCG on Day -1. In the NP group, NPs were fitted to calves on Day -9 and removed on Day -1. Cows were exposed to bull mating from Day 0 to 87. On Day -9, approximately 60% of cows did not have CL or had a low BCS (< 2.75). The NP group was associated (P ≤ 0.03) with higher blood glucose and lower serum NEFA concentrations on Day -1. Suckling restriction had no effect (P > 0.1) on follicular diameter on Day -1 (control = 12.4 ± 0.4 mm and NP = 13.1 ± 0.4 mm), pregnancy rate (PR) on Day 36 (control = 50.9% and NP = 44.7%), presence of CL in cows without confirmed pregnancy on Day 36, or overall PR on Day 132 (control = 94.1% and NP = 91.7%). Eight-day NP treatment had no effect (P > 0.1) on cow BCS, CL presence on Day 36, or calf body weight at weaning. Suckling restriction before IVD removal during an 8-day synchronization protocol did not improve fertility in multiparous beef cows.EEA Cuenca del SaladoFil: Rodriguez, Alejandro Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; ArgentinaFil: Rodriguez, Alejandro Martin. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Agronomía de Azul; ArgentinaFil: Lopez Valiente, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; ArgentinaFil: Bilbao, Guillermina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bilbao, Guillermina. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; ArgentinaFil: Bartolome, Julian. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; ArgentinaFil: Bartolome, Julian. World Wide Sires LTD; Estados UnidosFil: Pérez Wallace, Santiago. Syntex S.A.; ArgentinaFil: Maresca, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; ArgentinaSpringer2026-07-17T11:32:42Z2026-07-17T11:32:42Z2026-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/27043https://link.springer.com/article/10.1007/s11250-025-04819-40049-47471573-7438https://doi.org/10.1007/s11250-025-04819-4Tropical Animal Health and Production 58 : article number 33. (2026)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2026-09-24T11:43:27Zoai:localhost:20.500.12123/27043instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2026-09-24 11:43:29.061INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
title Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
spellingShingle Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
Rodriguez, Alejandro Martin
Ganado de Carne
Lactancia
Progesterona
Sincronización
Gestación
Beef Cattle
Bos taurus
Suckling
Progesterone
Estradiol
Synchronization
Pregnancy
title_short Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
title_full Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
title_fullStr Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
title_full_unstemmed Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
title_sort Effects of suckling restriction with nose plates during an 8-day progesterone, estradiol, and eCG-based synchronization protocol on reproductive performance in Bos taurus beef cows
dc.creator.none.fl_str_mv Rodriguez, Alejandro Martin
Lopez Valiente, Sebastian
Bilbao, María Guillermina
Bartolome, Julián Alberto
Pérez Wallace, Santiago
Maresca, Sebastian
author Rodriguez, Alejandro Martin
author_facet Rodriguez, Alejandro Martin
Lopez Valiente, Sebastian
Bilbao, María Guillermina
Bartolome, Julián Alberto
Pérez Wallace, Santiago
Maresca, Sebastian
author_role author
author2 Lopez Valiente, Sebastian
Bilbao, María Guillermina
Bartolome, Julián Alberto
Pérez Wallace, Santiago
Maresca, Sebastian
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ganado de Carne
Lactancia
Progesterona
Sincronización
Gestación
Beef Cattle
Bos taurus
Suckling
Progesterone
Estradiol
Synchronization
Pregnancy
topic Ganado de Carne
Lactancia
Progesterona
Sincronización
Gestación
Beef Cattle
Bos taurus
Suckling
Progesterone
Estradiol
Synchronization
Pregnancy
dc.description.none.fl_txt_mv We hypothesized that suckling restriction with nose plates (NPs) during an 8-day progesterone, estradiol, and eCG-based synchronization protocol increases fertility. On Day -9, body condition score (BCS; 1–5 scale) and the presence of corpus luteum (CL) were assessed in 502 Hereford cows (35–80 d postpartum), which were randomly assigned to the NP (n = 266) or control group (n = 236). The synchronization protocol consisted of inserting a 0.5 g progesterone intravaginal device (IVD) and administering estradiol benzoate (2.0 mg) on Day -9, followed by IVD removal and the administration of 0.5 mg estradiol cypionate and 400 IU eCG on Day -1. In the NP group, NPs were fitted to calves on Day -9 and removed on Day -1. Cows were exposed to bull mating from Day 0 to 87. On Day -9, approximately 60% of cows did not have CL or had a low BCS (< 2.75). The NP group was associated (P ≤ 0.03) with higher blood glucose and lower serum NEFA concentrations on Day -1. Suckling restriction had no effect (P > 0.1) on follicular diameter on Day -1 (control = 12.4 ± 0.4 mm and NP = 13.1 ± 0.4 mm), pregnancy rate (PR) on Day 36 (control = 50.9% and NP = 44.7%), presence of CL in cows without confirmed pregnancy on Day 36, or overall PR on Day 132 (control = 94.1% and NP = 91.7%). Eight-day NP treatment had no effect (P > 0.1) on cow BCS, CL presence on Day 36, or calf body weight at weaning. Suckling restriction before IVD removal during an 8-day synchronization protocol did not improve fertility in multiparous beef cows.
EEA Cuenca del Salado
Fil: Rodriguez, Alejandro Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Rodriguez, Alejandro Martin. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Agronomía de Azul; Argentina
Fil: Lopez Valiente, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Bilbao, Guillermina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bilbao, Guillermina. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina
Fil: Bartolome, Julian. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina
Fil: Bartolome, Julian. World Wide Sires LTD; Estados Unidos
Fil: Pérez Wallace, Santiago. Syntex S.A.; Argentina
Fil: Maresca, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
description We hypothesized that suckling restriction with nose plates (NPs) during an 8-day progesterone, estradiol, and eCG-based synchronization protocol increases fertility. On Day -9, body condition score (BCS; 1–5 scale) and the presence of corpus luteum (CL) were assessed in 502 Hereford cows (35–80 d postpartum), which were randomly assigned to the NP (n = 266) or control group (n = 236). The synchronization protocol consisted of inserting a 0.5 g progesterone intravaginal device (IVD) and administering estradiol benzoate (2.0 mg) on Day -9, followed by IVD removal and the administration of 0.5 mg estradiol cypionate and 400 IU eCG on Day -1. In the NP group, NPs were fitted to calves on Day -9 and removed on Day -1. Cows were exposed to bull mating from Day 0 to 87. On Day -9, approximately 60% of cows did not have CL or had a low BCS (< 2.75). The NP group was associated (P ≤ 0.03) with higher blood glucose and lower serum NEFA concentrations on Day -1. Suckling restriction had no effect (P > 0.1) on follicular diameter on Day -1 (control = 12.4 ± 0.4 mm and NP = 13.1 ± 0.4 mm), pregnancy rate (PR) on Day 36 (control = 50.9% and NP = 44.7%), presence of CL in cows without confirmed pregnancy on Day 36, or overall PR on Day 132 (control = 94.1% and NP = 91.7%). Eight-day NP treatment had no effect (P > 0.1) on cow BCS, CL presence on Day 36, or calf body weight at weaning. Suckling restriction before IVD removal during an 8-day synchronization protocol did not improve fertility in multiparous beef cows.
publishDate 2026
dc.date.none.fl_str_mv 2026-07-17T11:32:42Z
2026-07-17T11:32:42Z
2026-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/27043
https://link.springer.com/article/10.1007/s11250-025-04819-4
0049-4747
1573-7438
https://doi.org/10.1007/s11250-025-04819-4
url http://hdl.handle.net/20.500.12123/27043
https://link.springer.com/article/10.1007/s11250-025-04819-4
https://doi.org/10.1007/s11250-025-04819-4
identifier_str_mv 0049-4747
1573-7438
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Tropical Animal Health and Production 58 : article number 33. (2026)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.754232

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