| Journal: | Brazilian journal of veterinary research and animal science |
| Database: | PERIÓDICA |
| System number: | 000291677 |
| ISSN: | 1413-9596 |
| Authors: | Baruselli, Pietro Sampaio1 Madureira, Ed Hoffman Barnabe, Valquiria Hippolito Barnabe, Renato Campanarut Berber, Rodolfo Cassimiro de Araujo2 |
| Institutions: | 1Universidade de Sao Paulo, Faculdade de Medicina Veterinaria e Zootecnia, Sao Paulo. Brasil 2Fundacao Faculdades "Luiz Meneguel", Sao Paulo. Brasil |
| Year: | 2003 |
| Volumen: | 40 |
| Number: | 6 |
| Pages: | 431-442 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The objective of this study was to evaluate the efficiency of synchronization ovulation protocol (GnRH/PGF2alpha/GnRH) for fixed timed insemination in buffalo. In Experiment 1, thirty-three female buffaloes with 60 days postpartum, were divided in two groups for evaluation of the follicular dynamics (Group 1, n = 16, 10mg of GnRH/15mg of PGF2alpha/10mg of GnRH; Group 2, n = 17, 20mg of GnRH/15mg of PGF2alpha/10mg of GnRH). Ultrasonography exams were performed every 12 hours to verify the ovarian response to the first GnRH injection. Another evaluations were performed on PGF2a injection and second GnRH injection. After last hormonal injection, ultrasonography exams were performed every 6 hours to verify the moment of the ovulation. Blood samples were collected on Days 0, 7 and 9 to evaluate the progesterone concentrations at the moment of the hormonal injections. In Experiment 2, the efficiency of the synchronization of ovulation was verified for fixed timed insemination (16 hours after second GnRH injection, n=1053), during the favorable and unfavorable reproductive season, in the years of 1998 and 1999. Animals received 20mg of GnRH/15mg of PGF2alpha/10mg of GnRH. Besides, also recorded and evaluated aspects like body condition score, parity, postpartum period, year and the reproductive season (favorable or unfavorable season), on the conception rate. In Experiment 1, it was verified that 33.0 ± 8.3h after the first GnRH injection, 60.60% of the animals ovulated (Group 1 = 70.5 vs. Group 2 = 50.00%; P>0.05). The dose of GnRH (1 |
| Disciplines: | Medicina veterinaria y zootecnia |
| Keyword: | Bovinos, Reproducción y genética animal, Zootecnia, Sincronización de ovulation, GnRH, Búfalos, Protocolo OvSynch |
| Keyword: | Veterinary medicine and animal husbandry, Animal husbandry, Animal reproduction and genetics, Bovines, Ovulation synchronization, GnRH, Buffaloes, Ovsynch protocol |
| Full text: | Texto completo (Ver HTML) |
