Effect of insemination-to-induced ovulation interval on fertilization rate, embryo viability and number of accessory sperms in sows

Authors

  • Carlos Henrique Cabral Viana Fundação de Ensino Otávio Bastos, Faculdade de Medicina Veterinária, São João da Boa Vista, SP
  • Pedro Henrique Candini Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Rogério Dantas Gama Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Adriana Carbone Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Renato Campanarut Barnabe Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP

DOI:

https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26258

Keywords:

Swine, Synchronization, Insemination, Ovulation

Abstract

The ideal interval between AI and ovulation (OV) is not well determined yet, varying from 12 to 28 h before up to 4 h after ovulation. Utilization of gonadotrophins to synchronize ovulation would allow the pre-determination of the groups' size, according to the AI-OV intervals, and would contribute to determine a secure interval between AI-OV. 120 sows received 7.5 mg IM of Luprostiol, between days 12 and 17 of the estrous cycle, 600 IU of eCG IM 24 h after prostaglandin and 5.0 mg of LH IM 72 h after eCG injection. The moment of ovulation was diagnosed by transrectal ultrasonography at intervals of 6 h. There were 5 treatments according to IA-OV interval: T1- 48 to 36 h before OV; T2- 36 to 24 h before OV; T3- 24 to 12 h before OV; T4- 12 to 0 h before OV and T5- 0 to 12 h after OV. Sows were slaughtered 96.7±11.37 h after OV. Recovery rate (RR), number of corpora lutea (NC), total number of structures (ST), fertilization rate (FR), embryo viability (EV) and number of accessory sperm (AS) were analyzed. The synchronization protocol showed an homogenous distribution of the animals among treatments (LH-OV interval 39.22±7.6h), and it didn't influenced the results. FR and EV results suggest that 36 h is the time of sperm viability in sow genital tract. There was a strong decline of AS between T3 and T4.

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Published

2006-02-01

How to Cite

Viana, C. H. C., Candini, P. H., Gama, R. D., Carbone, A., & Barnabe, R. C. (2006). Effect of insemination-to-induced ovulation interval on fertilization rate, embryo viability and number of accessory sperms in sows. Brazilian Journal of Veterinary Research and Animal Science, 43(1), 132-138. https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26258

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