The uterine diameter and ovarian activity influence the presence of estrus and pregnancy in beef heifers under a J-Synch protocol for fixed-time artificial insemination
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作者:
Espinoza-Villavicencio, Jose Luis
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Univ Autonoma Baja California Sur, La Paz, Baja California, MexicoUniv Autonoma Baja California Sur, La Paz, Baja California, Mexico
Espinoza-Villavicencio, Jose Luis
[1
]
Palacios-Espinosa, Alejandro
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Univ Autonoma Baja California Sur, La Paz, Baja California, MexicoUniv Autonoma Baja California Sur, La Paz, Baja California, Mexico
Palacios-Espinosa, Alejandro
[1
]
Murillo-Amador, Bernardo
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Ctr Invest Biol Noroeste SC, La Paz, Baja California, MexicoUniv Autonoma Baja California Sur, La Paz, Baja California, Mexico
Murillo-Amador, Bernardo
[2
]
Ortega-Perez, Ricardo
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Univ Autonoma Baja California Sur, La Paz, Baja California, MexicoUniv Autonoma Baja California Sur, La Paz, Baja California, Mexico
Ortega-Perez, Ricardo
[1
]
机构:
[1] Univ Autonoma Baja California Sur, La Paz, Baja California, Mexico
The study assessed how the diameter of uterine horns and cyclical activity in beef heifers influence their estrous behavior and gestation rates with fixed-time artificial insemination (FTAI). A total of 100 B. taurus heifers (undefined crosses of Angus, Charolais, and Gelbvieh) weighing 300 +/- 32 kg were evaluated for their body condition (scale 1 to 5), uterine horn diameter (1: less than 1 cm; 2: 1 to 1.5 cm; 3: greather than 1.5 cm), and cyclical activity at the start of the protocol. Cyclical activity was classified into cycling (C), superficial anestrus (AS), or deep anestrus (AP). The J-Synch protocol was used for ovulation synchronization, with estrous activity monitored through paint at the base of the tail. The results showed that 81% of the cyclin (C) heifers exhibited estrus within 72 hours of completing the protocol, significantly surpassing AS and AP heifers (P <= 0.001). P <= 0.001). The presence of estrus in heifers with a larger uterine diameter was higher than in those with a smaller diameter (P <= 0.001). P <= 0.001). Additionally, the intensity of estrus significantly influenced gestation rates 30 days post-FTAI (P <= 0.003). P <= 0.003). Cyclical activity and the diameter of the uterine horns at the start of the treatment also affected pregnancy rates (P <= 0.05). P <= 0.05). In conclusion the uterine horn diameter and initial cyclical activity in beef heifers impact their response to the J-Synch protocol and the rates.
机构:
Virginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Virginia Tech, Large Anim Clin Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Mercadante, Vitor R. G. Rodrigues Gomes
Lamb, G. Cliff C.
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Texas A&M Univ, College Stn, TX 77843 USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Lamb, G. Cliff C.
Oosthuizen, Nicky
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ABS Global, De Forest, WI USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Oosthuizen, Nicky
Dias, Nicholas W. Wege
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Virginia Tech, Anim & Poultry Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Dias, Nicholas W. Wege
Pancini, Stefania
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Virginia Tech, Anim & Poultry Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Pancini, Stefania
Haines, Hannah
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Virginia Tech, Anim & Poultry Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Haines, Hannah
Currin, John
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Virginia Tech, Large Anim Clin Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Currin, John
Clark, Sherrie
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Virginia Tech, Large Anim Clin Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Clark, Sherrie
Stewart, Jamie L.
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Virginia Tech, Large Anim Clin Sci, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Stewart, Jamie L.
Pent, Gabriel J.
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Virginia Tech, Shenandoah Valley Agr Res & Extens Ctr, Blacksburg, VA USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Pent, Gabriel J.
Holton, Matthew P.
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Univ Georgia, Anim & Dairy Sci, Athens, GA 30602 USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Holton, Matthew P.
Davis, Dylan B.
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Univ Georgia, Anim & Dairy Sci, Athens, GA 30602 USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Davis, Dylan B.
Hernandez, Shane R. R.
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Univ Georgia, Anim & Dairy Sci, Athens, GA 30602 USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Hernandez, Shane R. R.
Stewart, R. Lawton
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Univ Georgia, Anim & Dairy Sci, Athens, GA 30602 USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
Stewart, R. Lawton
Fontes, Pedro L.
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Univ Georgia, Athens, GA 30602 USAVirginia Tech, Anim & Poultry Sci, Blacksburg, VA USA
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Patricio Anchordoquy, Juan
Nicolas Lorenti, Santiago
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Serv Integral Ganadero SIG, Brandsen, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Nicolas Lorenti, Santiago
Sebastian Polero, Gustavo
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25 Mayo, Buenos Aires, DF, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Sebastian Polero, Gustavo
Agustin Farnetano, Nicolas
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Agustin Farnetano, Nicolas
Esther Rosa, Diana
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Univ Nacl La Plata, Lab Nutr Mineral, Fac Ciencias Vet, RA-1900 La Plata, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Esther Rosa, Diana
Carolina Fabra, Mariana
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Carolina Fabra, Mariana
Cristina Carranza-Martin, Ana
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Cristina Carranza-Martin, Ana
Nikoloff, Noelia
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Nikoloff, Noelia
Cristina Furnus, Cecilia
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina
Cristina Furnus, Cecilia
Mateo Anchordoquy, Juan
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Univ Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, Fac Ciencias Vet, IGEVET Inst Genet Vet Ing Fernando N Dulout UNLP, Calle 60&118 S-N, RA-1900 La Plata, Buenos Aires, Argentina