Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)

Autores: Abalos, Marcos; Acuña, Francisco Antonio; Cancino, Andrea Karina; Aller Atucha, Juan Florencio
Año de publicación: 2018
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: The objectives of the present study were to determine the effects of exogenous GnRH administered7 days after breeding on the formation of an accessory corpus luteum (ACL), plasma progesterone(P4) concentrations and pregnancy rates. Adult females (n=71) having a follicle≥ 7mm in diameter in the ovary were naturally mated (Day 0). On Day 7, ultrasonicexamination was performed to confirm the occurrence of ovulation as evidenced by presence o an induced corpus luteum (ICL). Females with an ICL plus a dominant follicle≥7mm (n=56) were treated with saline solution (SS, n=29) or GnRH analogue (n=27). On Day 14, the formation of an ACL was observed by ultrasonography. Blood samples were collected on Days 7 and 14 to quantify plasma P4 concentrations. On Day 14, 21 of 27 (77.8%) females in the GnRH group developed an ACL, whereas females in the SS group did not. Progesterone concentrations on Day 7 and 14 in those llamas diagnosed as pregnant on Day 30 were not different (P > 0.05) between groups. In addition, P4 concentration was similar for GnRH-treated females having two CL to those with a single CL. Pregnancy rates were similar (P > 0.05) between SS and GnRH groups (55.2% compared with 74.1% respectively) and the pregnancy rate for the GnRH group was notaffected (P > 0.05) by the number of CL observed at Day 14 (66.6% and 75.6% for females with one and two CL respectively). In conclusion, GnRH administration on Day 7 after breeding leads to ACL formation; however, neither the plasma P4 concentration nor pregnancy rate was affected by having an ACL.
EEA Balcarce
Fil: Abalos, Marcos. INTA, Estación Experimental Agropecuaria Abra Pampa; Argentina
Fil: Acuña, Francisco Antonio. INTA, Estación Experimental Agropecuaria Abra Pampa; Argentina
Fil: Cancino, Andrea Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina
Fil: Aller Atucha, Juan Florencio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fuente: Animal reproduction science 190 : 47-52. (March 2018)
Materia: Llama
Cuerpo Lúteo
Progesterona
Gestación
Hormonas
Llamas
Corpus Luteum
Progesterone
Pregnancy
Hormones
Nivel de accesibilidad: acceso restringido
Condiciones de uso
Repositorio
Institución: Instituto Nacional de Tecnología Agropecuaria
OAI Identificador: oai:localhost:20.500.12123/2216

Acceder

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spelling	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)Abalos, MarcosAcuña, Francisco AntonioCancino, Andrea KarinaAller Atucha, Juan FlorencioLlamaCuerpo LúteoProgesteronaGestaciónHormonasLlamasCorpus LuteumProgesteronePregnancyHormonesThe objectives of the present study were to determine the effects of exogenous GnRH administered7 days after breeding on the formation of an accessory corpus luteum (ACL), plasma progesterone(P4) concentrations and pregnancy rates. Adult females (n=71) having a follicle≥ 7mm in diameter in the ovary were naturally mated (Day 0). On Day 7, ultrasonicexamination was performed to confirm the occurrence of ovulation as evidenced by presence o an induced corpus luteum (ICL). Females with an ICL plus a dominant follicle≥7mm (n=56) were treated with saline solution (SS, n=29) or GnRH analogue (n=27). On Day 14, the formation of an ACL was observed by ultrasonography. Blood samples were collected on Days 7 and 14 to quantify plasma P4 concentrations. On Day 14, 21 of 27 (77.8%) females in the GnRH group developed an ACL, whereas females in the SS group did not. Progesterone concentrations on Day 7 and 14 in those llamas diagnosed as pregnant on Day 30 were not different (P > 0.05) between groups. In addition, P4 concentration was similar for GnRH-treated females having two CL to those with a single CL. Pregnancy rates were similar (P > 0.05) between SS and GnRH groups (55.2% compared with 74.1% respectively) and the pregnancy rate for the GnRH group was notaffected (P > 0.05) by the number of CL observed at Day 14 (66.6% and 75.6% for females with one and two CL respectively). In conclusion, GnRH administration on Day 7 after breeding leads to ACL formation; however, neither the plasma P4 concentration nor pregnancy rate was affected by having an ACL.EEA BalcarceFil: Abalos, Marcos. INTA, Estación Experimental Agropecuaria Abra Pampa; ArgentinaFil: Acuña, Francisco Antonio. INTA, Estación Experimental Agropecuaria Abra Pampa; ArgentinaFil: Cancino, Andrea Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; ArgentinaFil: Aller Atucha, Juan Florencio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina2018-04-10T15:03:25Z2018-04-10T15:03:25Z2018-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/2216https://www.sciencedirect.com/science/article/pii/S0378432017307236?via%3Dihub0378-4320https://doi.org/10.1016/j.anireprosci.2018.01.006Animal reproduction science 190 : 47-52. (March 2018)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-09-29T13:44:17Zoai:localhost:20.500.12123/2216instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:17.512INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
title	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
spellingShingle	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama) Abalos, Marcos Llama Cuerpo Lúteo Progesterona Gestación Hormonas Llamas Corpus Luteum Progesterone Pregnancy Hormones
title_short	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
title_full	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
title_fullStr	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
title_full_unstemmed	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
title_sort	Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)
dc.creator.none.fl_str_mv	Abalos, Marcos Acuña, Francisco Antonio Cancino, Andrea Karina Aller Atucha, Juan Florencio
author	Abalos, Marcos
author_facet	Abalos, Marcos Acuña, Francisco Antonio Cancino, Andrea Karina Aller Atucha, Juan Florencio
author_role	author
author2	Acuña, Francisco Antonio Cancino, Andrea Karina Aller Atucha, Juan Florencio
author2_role	author author author
dc.subject.none.fl_str_mv	Llama Cuerpo Lúteo Progesterona Gestación Hormonas Llamas Corpus Luteum Progesterone Pregnancy Hormones
topic	Llama Cuerpo Lúteo Progesterona Gestación Hormonas Llamas Corpus Luteum Progesterone Pregnancy Hormones
dc.description.none.fl_txt_mv	The objectives of the present study were to determine the effects of exogenous GnRH administered7 days after breeding on the formation of an accessory corpus luteum (ACL), plasma progesterone(P4) concentrations and pregnancy rates. Adult females (n=71) having a follicle≥ 7mm in diameter in the ovary were naturally mated (Day 0). On Day 7, ultrasonicexamination was performed to confirm the occurrence of ovulation as evidenced by presence o an induced corpus luteum (ICL). Females with an ICL plus a dominant follicle≥7mm (n=56) were treated with saline solution (SS, n=29) or GnRH analogue (n=27). On Day 14, the formation of an ACL was observed by ultrasonography. Blood samples were collected on Days 7 and 14 to quantify plasma P4 concentrations. On Day 14, 21 of 27 (77.8%) females in the GnRH group developed an ACL, whereas females in the SS group did not. Progesterone concentrations on Day 7 and 14 in those llamas diagnosed as pregnant on Day 30 were not different (P > 0.05) between groups. In addition, P4 concentration was similar for GnRH-treated females having two CL to those with a single CL. Pregnancy rates were similar (P > 0.05) between SS and GnRH groups (55.2% compared with 74.1% respectively) and the pregnancy rate for the GnRH group was notaffected (P > 0.05) by the number of CL observed at Day 14 (66.6% and 75.6% for females with one and two CL respectively). In conclusion, GnRH administration on Day 7 after breeding leads to ACL formation; however, neither the plasma P4 concentration nor pregnancy rate was affected by having an ACL. EEA Balcarce Fil: Abalos, Marcos. INTA, Estación Experimental Agropecuaria Abra Pampa; Argentina Fil: Acuña, Francisco Antonio. INTA, Estación Experimental Agropecuaria Abra Pampa; Argentina Fil: Cancino, Andrea Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina Fil: Aller Atucha, Juan Florencio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
description	The objectives of the present study were to determine the effects of exogenous GnRH administered7 days after breeding on the formation of an accessory corpus luteum (ACL), plasma progesterone(P4) concentrations and pregnancy rates. Adult females (n=71) having a follicle≥ 7mm in diameter in the ovary were naturally mated (Day 0). On Day 7, ultrasonicexamination was performed to confirm the occurrence of ovulation as evidenced by presence o an induced corpus luteum (ICL). Females with an ICL plus a dominant follicle≥7mm (n=56) were treated with saline solution (SS, n=29) or GnRH analogue (n=27). On Day 14, the formation of an ACL was observed by ultrasonography. Blood samples were collected on Days 7 and 14 to quantify plasma P4 concentrations. On Day 14, 21 of 27 (77.8%) females in the GnRH group developed an ACL, whereas females in the SS group did not. Progesterone concentrations on Day 7 and 14 in those llamas diagnosed as pregnant on Day 30 were not different (P > 0.05) between groups. In addition, P4 concentration was similar for GnRH-treated females having two CL to those with a single CL. Pregnancy rates were similar (P > 0.05) between SS and GnRH groups (55.2% compared with 74.1% respectively) and the pregnancy rate for the GnRH group was notaffected (P > 0.05) by the number of CL observed at Day 14 (66.6% and 75.6% for females with one and two CL respectively). In conclusion, GnRH administration on Day 7 after breeding leads to ACL formation; however, neither the plasma P4 concentration nor pregnancy rate was affected by having an ACL.
publishDate	2018
dc.date.none.fl_str_mv	2018-04-10T15:03:25Z 2018-04-10T15:03:25Z 2018-03
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/20.500.12123/2216 https://www.sciencedirect.com/science/article/pii/S0378432017307236?via%3Dihub 0378-4320 https://doi.org/10.1016/j.anireprosci.2018.01.006
url	http://hdl.handle.net/20.500.12123/2216 https://www.sciencedirect.com/science/article/pii/S0378432017307236?via%3Dihub https://doi.org/10.1016/j.anireprosci.2018.01.006
identifier_str_mv	0378-4320
dc.language.none.fl_str_mv	eng
language	eng
dc.rights.none.fl_str_mv	info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv	restrictedAccess
dc.format.none.fl_str_mv	application/pdf
dc.source.none.fl_str_mv	Animal reproduction science 190 : 47-52. (March 2018) 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	12.559606

Effect of GnRH analogue administration on Day 7 after natural mating on formation accessory corpus luteum, progesterone concentration and conception rate in llamas (Lama glama)

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