Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system
To evaluate two formulations of progesterone (injectable: MAD-4, or intravaginal: DIV) included in the estrus synchronization protocol HeatSynch, 377 lactating Holstein cows, primiparous and multiparous, cycling and in anestrus, located in three dairies were used. The Protocol consisted of: Day 0: GnRH and administration of MAD-4 or DIV; Day 7: Prostaglandin (PG); Day 8: (BE) Estradiol Benzoate; Day 9: heat detection and AI; Day 10: Fixed Time Artificial Insemination (FTAI) to cows that did not show heat; Day 45: pregnancy diagnosis using ultrasound. Milk samples were obtained at Days - 7 and 0 for determination ovarian activity according to levels of progesterone. First service pregnancy rates were: 20.5% in Farm 1, 30.8% in Farm 2, and 43.3% in Farm 3 (P<0.05). Fertility of treatment was not affected by progesterone formulation (DIV: 33.0%, MAD-4: 33.1%; P>0.01) cyclicity (Cycling: 32.3%, Anestrus: 35.3%; P>0.01) or parity (Primiparous: 36.1%, Multiparous: 30.2%; P>0.01). An interaction was found between farm and cyclicity (P<0.05). Pregnancy rate was lower in Primiparous of farm 1 than in farms 2 and 3 (12.9% vs. 49.8% and 33.3%; P<0.05). Bases on the lack of differences between treatments it was concluded that it is possible to replace intravaginal devices with injectable progesterone, as a presentation easier to apply and that does not generate wastes of hormonal pollutants.
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Sociedad de Medicina Veterinaria del Uruguay (SMVU)
2015
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Martínez-Barbitta, M. Gil, J. Costa, G. Pombo, I. Peñagaricano, J. Lutz, M. Freire, A. Cavestany, D. |
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Martínez-Barbitta, M. Gil, J. Costa, G. Pombo, I. Peñagaricano, J. Lutz, M. Freire, A. Cavestany, D. Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system |
| author_facet |
Martínez-Barbitta, M. Gil, J. Costa, G. Pombo, I. Peñagaricano, J. Lutz, M. Freire, A. Cavestany, D. |
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Martínez-Barbitta, M. |
| title |
Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system |
| title_short |
Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system |
| title_full |
Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system |
| title_fullStr |
Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system |
| title_full_unstemmed |
Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system |
| title_sort |
evaluation of two formulations of progesterone in heatsynch protocols in lactating holstein cows in a pasture-based system |
| description |
To evaluate two formulations of progesterone (injectable: MAD-4, or intravaginal: DIV) included in the estrus synchronization protocol HeatSynch, 377 lactating Holstein cows, primiparous and multiparous, cycling and in anestrus, located in three dairies were used. The Protocol consisted of: Day 0: GnRH and administration of MAD-4 or DIV; Day 7: Prostaglandin (PG); Day 8: (BE) Estradiol Benzoate; Day 9: heat detection and AI; Day 10: Fixed Time Artificial Insemination (FTAI) to cows that did not show heat; Day 45: pregnancy diagnosis using ultrasound. Milk samples were obtained at Days - 7 and 0 for determination ovarian activity according to levels of progesterone. First service pregnancy rates were: 20.5% in Farm 1, 30.8% in Farm 2, and 43.3% in Farm 3 (P<0.05). Fertility of treatment was not affected by progesterone formulation (DIV: 33.0%, MAD-4: 33.1%; P>0.01) cyclicity (Cycling: 32.3%, Anestrus: 35.3%; P>0.01) or parity (Primiparous: 36.1%, Multiparous: 30.2%; P>0.01). An interaction was found between farm and cyclicity (P<0.05). Pregnancy rate was lower in Primiparous of farm 1 than in farms 2 and 3 (12.9% vs. 49.8% and 33.3%; P<0.05). Bases on the lack of differences between treatments it was concluded that it is possible to replace intravaginal devices with injectable progesterone, as a presentation easier to apply and that does not generate wastes of hormonal pollutants. |
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Sociedad de Medicina Veterinaria del Uruguay (SMVU) |
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2015 |
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https://www.revistasmvu.com.uy/index.php/smvu/article/view/116 |
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rev-smvu-uy-article-1162019-09-07T22:15:54Z Evaluation of two formulations of progesterone in HeatSynch protocols in lactating Holstein cows in a pasture-based system Evaluación de dos formulaciones de progesterona en protocolos HeatSynch en vacas Holando lactando en sistemas pastoriles Martínez-Barbitta, M. Gil, J. Costa, G. Pombo, I. Peñagaricano, J. Lutz, M. Freire, A. Cavestany, D. Vacas para leche Progesterona Sincronización de celos Anestro posparto Dairy cows Progesterone Estrus synchronization Postpartum anestrus To evaluate two formulations of progesterone (injectable: MAD-4, or intravaginal: DIV) included in the estrus synchronization protocol HeatSynch, 377 lactating Holstein cows, primiparous and multiparous, cycling and in anestrus, located in three dairies were used. The Protocol consisted of: Day 0: GnRH and administration of MAD-4 or DIV; Day 7: Prostaglandin (PG); Day 8: (BE) Estradiol Benzoate; Day 9: heat detection and AI; Day 10: Fixed Time Artificial Insemination (FTAI) to cows that did not show heat; Day 45: pregnancy diagnosis using ultrasound. Milk samples were obtained at Days - 7 and 0 for determination ovarian activity according to levels of progesterone. First service pregnancy rates were: 20.5% in Farm 1, 30.8% in Farm 2, and 43.3% in Farm 3 (P<0.05). Fertility of treatment was not affected by progesterone formulation (DIV: 33.0%, MAD-4: 33.1%; P>0.01) cyclicity (Cycling: 32.3%, Anestrus: 35.3%; P>0.01) or parity (Primiparous: 36.1%, Multiparous: 30.2%; P>0.01). An interaction was found between farm and cyclicity (P<0.05). Pregnancy rate was lower in Primiparous of farm 1 than in farms 2 and 3 (12.9% vs. 49.8% and 33.3%; P<0.05). Bases on the lack of differences between treatments it was concluded that it is possible to replace intravaginal devices with injectable progesterone, as a presentation easier to apply and that does not generate wastes of hormonal pollutants. Para evaluar dos formulaciones de progesterona (inyectable: MAD-4, o impregnada en un dispositivo intravaginal: DIV) incluidas en el protocolo de sincronización de celos HeatSynch, se utilizaron 377 vacas Holando en producción, primíparas y multíparas, ciclando y en anestro, ubicadas en tres tambos. El protocolo consistió en: Día 0: GnRH y administración de MAD-4 o DIV; Día 7: Prostaglandina (PG); Día 8: Benzoato de estradiol (BE); Día 9: detección de celo e IA; Día 10: Inseminación Artificial a Tiempo Fijo (IATF) a vacas que no mostraron celo. Se realizó el diagnóstico de gestación mediante ultrasonografía a 45 días del inicio de los tratamientos. Se extrajeron muestras de leche los Días -7 y 0 para determinación de actividad ovárica mediante la dosificación de progesterona. Los porcentajes de preñez a la primera inseminación fueron: 20,5% en el tambo 1, 30,8% en el tambo 2, y 43,3% en el tambo 3 (P<0,05). La fertilidad del tratamiento no fue afectada por la fuente de progesterona (DIV: 33,0, MAD-4: 33,1%; P>0,01) la ciclicidad (Ciclando: 32,3%, Anestro: 35,3%; P>0,01) ni la paridad (Primíparas: 36,1%, Multíparas: 30,2%; P>0,01). Se encontró una interacción entre tambo y ciclicidad (P<0,05). El porcentaje de preñez fue menor en las primíparas del tambo 1 que las de los tambos 2 y 3 (12,9% vs. 49,8% y 33,3%; P<0,05). No se observaron diferencias entre los tratamientos, concluyéndose que es posible sustituir los dispositivos intravaginales por progesterona inyectable, como una presentación más fácil de aplicar y que no genera residuos hormonales contaminantes. Sociedad de Medicina Veterinaria del Uruguay (SMVU) 2015-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed article. Artículo evaluado por pares. Artigo revisado por pares. application/pdf https://www.revistasmvu.com.uy/index.php/smvu/article/view/116 Veterinaria (Montevideo); Vol. 51 No. 200 (2015): December; 26-35 Veterinaria (Montevideo); Vol. 51 Núm. 200 (2015): Diciembre; 26-35 Veterinaria (Montevideo); v. 51 n. 200 (2015): Dezembro; 26-35 1688-4809 0376-4362 spa https://www.revistasmvu.com.uy/index.php/smvu/article/view/116/61 Derechos de autor 2015 Sociedad de Medicina Veterinaria del Uruguay |