Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination

The objective of the present work was to evaluate the effect of J-Synch protocol used in heifers on pregnancy rate submitted to fixed time artificial insemination (FTAI). Six hundred and thirteen Angus heifers were used (age range: 13.5 to 15 months; body condition: 3 to 3.5 -scale 1 to 5 (1: emacia...

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Autores principales: Dominicis, O., Madero, S., Catalano, R., Cabodevila, J., Callejas, S.
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2020
Materias:
Heifers
treatment J-Synch
insemination FTAI
pregnancy
Vaquillonas
tratamiento J-Synch
inseminación IATF
preñez
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/4131
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-4131
record_format ojs
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic Heifers
treatment J-Synch
insemination FTAI
pregnancy
Vaquillonas
tratamiento J-Synch
inseminación IATF
preñez
spellingShingle Heifers
treatment J-Synch
insemination FTAI
pregnancy
Vaquillonas
tratamiento J-Synch
inseminación IATF
preñez
Dominicis, O.
Madero, S.
Catalano, R.
Cabodevila, J.
Callejas, S.
Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
topic_facet Heifers
treatment J-Synch
insemination FTAI
pregnancy
Vaquillonas
tratamiento J-Synch
inseminación IATF
preñez
author Dominicis, O.
Madero, S.
Catalano, R.
Cabodevila, J.
Callejas, S.
author_facet Dominicis, O.
Madero, S.
Catalano, R.
Cabodevila, J.
Callejas, S.
author_sort Dominicis, O.
title Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
title_short Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
title_full Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
title_fullStr Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
title_full_unstemmed Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
title_sort effect of jsynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination
description The objective of the present work was to evaluate the effect of J-Synch protocol used in heifers on pregnancy rate submitted to fixed time artificial insemination (FTAI). Six hundred and thirteen Angus heifers were used (age range: 13.5 to 15 months; body condition: 3 to 3.5 -scale 1 to 5 (1: emaciated and 5: obese) and weight: ≥ 260 kg. The animals were randomly assigned to the experimental units (heifers) according to a completely randomized design, to the following group: 1) J-Synch (n=205): on day 0 an intravaginal device was inserted with 0.6 g of progesterone (IVD) plus 2 mg of estradiol benzoate. On day 6 the device was removal and 0.15 mg of d-cloprostenol was administered. On day 9 (70-72 h after device removal), 0.10 mg of buserelin was injected and FTAI was performed. 2) Conventional 7D (n=206): on day 0 an intravaginal device (IVD) was inserted plus 2 mg of estradiol benzoate. On day 7 the device was removed and 0.15 mg of d-cloprostenol and 0.5 mg of estradiol cypionate were administered. On day 9 (50-52 h after device removal), FTAI was performed. 3) Conventional 8D (n=202): similar to Conventional group 7D, with the exception that the device remained in the vagina for a period of 8 days. For FTAI, frozen / thawed semen from a bull of proven fertility was used. Gestation diagnosis were performed at 30 days after FTAI. The statistical analysis was made by SAS. A 95% confidence level was established (α=0.05). Animals that lost the device (3.4%) were excluded from the statistical analysis. The pregnancy rate was not different between treatments (J-synch: 50.8%, Conventional 7D: 43.4% and Conventional 8D: 47.7%, p>0.05). In conclusion, J-Synch treatment used in beef heifers (13.5-15 months of age) generates pregnancy rate after FTAI similar to conventional treatment.
publisher Universidad Nacional del Nordeste
publishDate 2020
url https://revistas.unne.edu.ar/index.php/vet/article/view/4131
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spelling I48-R154-article-41312025-02-12T21:59:01Z Effect of JSynch treatment on pregnancy rate in heifers submitted to fixed time artificial insemination Efecto del tratamiento J-Synch sobre el porcentaje de preñez en vaquillonas para cría inseminadas a tiempo fijo Dominicis, O. Madero, S. Catalano, R. Cabodevila, J. Callejas, S. Heifers treatment J-Synch insemination FTAI pregnancy Vaquillonas tratamiento J-Synch inseminación IATF preñez The objective of the present work was to evaluate the effect of J-Synch protocol used in heifers on pregnancy rate submitted to fixed time artificial insemination (FTAI). Six hundred and thirteen Angus heifers were used (age range: 13.5 to 15 months; body condition: 3 to 3.5 -scale 1 to 5 (1: emaciated and 5: obese) and weight: ≥ 260 kg. The animals were randomly assigned to the experimental units (heifers) according to a completely randomized design, to the following group: 1) J-Synch (n=205): on day 0 an intravaginal device was inserted with 0.6 g of progesterone (IVD) plus 2 mg of estradiol benzoate. On day 6 the device was removal and 0.15 mg of d-cloprostenol was administered. On day 9 (70-72 h after device removal), 0.10 mg of buserelin was injected and FTAI was performed. 2) Conventional 7D (n=206): on day 0 an intravaginal device (IVD) was inserted plus 2 mg of estradiol benzoate. On day 7 the device was removed and 0.15 mg of d-cloprostenol and 0.5 mg of estradiol cypionate were administered. On day 9 (50-52 h after device removal), FTAI was performed. 3) Conventional 8D (n=202): similar to Conventional group 7D, with the exception that the device remained in the vagina for a period of 8 days. For FTAI, frozen / thawed semen from a bull of proven fertility was used. Gestation diagnosis were performed at 30 days after FTAI. The statistical analysis was made by SAS. A 95% confidence level was established (α=0.05). Animals that lost the device (3.4%) were excluded from the statistical analysis. The pregnancy rate was not different between treatments (J-synch: 50.8%, Conventional 7D: 43.4% and Conventional 8D: 47.7%, p>0.05). In conclusion, J-Synch treatment used in beef heifers (13.5-15 months of age) generates pregnancy rate after FTAI similar to conventional treatment. El objetivo del trabajo fue evaluar el efecto del J-Synch en vaquillonas para cría sobre el porcentaje de preñez post inseminación artificial a tiempo fijo (IATF). Se utilizaron 613 vaquillonas Angus (edad: 13,5 a 15 meses; condición corporal: 3 a 3,5 - escala 1 a 5 (1: emaciada, 5: obesa) y peso: ≥ 260 kg). Los animales fueron asignados aleatoriamente a 3 grupos de unidades experimentales (diseño completamente aleatorizado): 1) J-Synch (n=205): el día 0 se colocó un dispositivo intravaginal con 0,6 g de progesterona (DISP) más 2 mg de benzoato de estradiol (BE). El día 6 se retiró el DISP y se administró 0,15 mg de d-cloprostenol. El día 9 (70-72 h post retiro del DISP), se inyectó 0,10 mg de buserelina y se realizó IATF. 2) Convencional 7D (n=206): el día 0 se colocó un DISP más 2 mg de BE. El día 7 se retiró el DISP y se administraron 0,15 mg de d-cloprostenol y 0,5 mg de cipionato de estradiol. El día 9 (50-52 h post DISP) se realizó IATF. 3) Convencional 8D (n=202): ídem grupo Convencional 7D, con la salvedad que el DISP permaneció colocado durante 8 días. Para la IATF se utilizó semen congelado/descongelado proveniente de un toro de probada fertilidad. El diagnóstico de gestación se realizó a los 30 días post IATF. El análisis estadístico se realizó por SAS (nivel de confianza: 95%). Los animales que perdieron el dispositivo fueron excluidos del análisis. El 3,4% de las vaquillonas perdieron el DISP. El porcentaje de preñez no difirió entre tratamientos (J-Synch: 50,8%; Convencional 7D: 43,4% y Convencional 8D: 47,7%, p>0,05). Se concluye que el tratamiento J-Synch utilizado en vaquillonas para cría (13,5-15 meses de edad) genera porcentajes de preñez post IATF similares al tratamiento convencional. Universidad Nacional del Nordeste 2020-02-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/4131 10.30972/vet.3024131 Revista Veterinaria; Vol. 30 Núm. 2 (2019); 31-35 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/4131/3768 Derechos de autor 2019 O. Dominicis, S. Madero, R. Catalano, J. Cabodevila, S. Callejas https://creativecommons.org/licenses/by-nc/4.0

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