Effects on Synchronization and Reproductive Efficiency of Delaying the Removal of the Intravaginal Progesterone Device by 24 h in the 5d Co-synch Protocol in Heifers
| Autor: | Juan V. González-Martín, José Luis Pesantez-Pacheco, Natividad Perez-Villalobos, Susana Astiz, Aitor Fernandez-Novo, Sergio Santos-Lopez, Ana Heras-Molina |
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| Přispěvatelé: | Fernandez-Novo, Aitor, Santos-Lopez, Sergio, Pesantez-Pacheco, Jose Luis, Pérez-Villalobos, Natividad, Heras-Molina, Ana, Gonzalez-Martin, Juan Vicente, Astiz, Susana, Fernandez-Novo, Aitor [0000-0003-0112-8543], Santos-Lopez, Sergio [0000-0003-2651-3130], Pesantez-Pacheco, Jose Luis [0000-0002-5669-6014], Pérez-Villalobos, Natividad [0000-0002-2287-3916], Heras-Molina, Ana [0000-0001-7496-9680], Gonzalez-Martin, Juan Vicente [0000-0001-7133-5148], Astiz, Susana [0000-0002-9718-0903] |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_treatment
ovarian physiology Biology Fecundidad Fisiología FTAI Article Ovarian physiology Animal science Animal welfare Conception rate Synchronization (computer science) lcsh:Zoology medicine conception rate Ganado vacuno lcsh:QL1-991 Protocol (science) lcsh:Veterinary medicine General Veterinary Artificial insemination Animal management Ovario Herd lcsh:SF600-1100 Animal Science and Zoology Veterinaria Co-synch |
| Zdroj: | Animals, Vol 11, Iss 849, p 849 (2021) Animals Volume 11 Issue 3 ABACUS. Repositorio de Producción Científica Universidad Europea (UEM) Animals : an Open Access Journal from MDPI Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2076-2615 |
| Popis: | SGIT-INIA In beef herds, increasing animal welfare, improving reproductive performance and easing animal management are key goals in farm economics. We explored whether delaying the removal of the intravaginal progesterone device by 24 h in heifers synchronized with a 5d Co-synch 72-h protocol could improve reproductive efficiency of fixed-time artificial insemination (FTAI). In experiment 1, we examined the total synchronization rate (TSR) in cycling Holstein heifers. Heifers (13.4 ± 0.69 mo.) were randomly assigned to the standard 5d Co-synch 56-h protocol (5dCo56; n = 10), 5d Co-synch 72-h (5dCo72; n = 17), or the modified 5d Co-synch 72-h protocol, in which removal of the progesterone device was delayed by 24 h (6dCo48; n = 19). In experiment 2, 309 cycling beef heifers on 18 commercial farms were subjected to the 5d Co-synch 72-h or 6-d Co-synch 48-h protocol and conception rate (CR) studied. In experiment 1, the three protocols led no differences on TSRs of 80.0% (5dCo56), 88.2% (5dCo72), and 89.5% (6dCo48). In experiment 2, the CR from the beef heifers, observed during two consecutive reproductive seasons did not differ: 59.7% for 5dCo72 and 62.0% for 6dCo48 (p = 0.907). Therefore, delaying removal by 24 h provides satisfactory results without reducing reproductive efficiency of heifers. 12 Pag. |
| Databáze: | OpenAIRE |
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