Assessment of the Luteinizing Hormon (LH) use in ovulation induction in sows

Authors

  • Pedro Henrique Candini Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Aníbal de Sant'Anna Moretti Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Eraldo Luis Zanella Faculdade de Medicina Veterinária de Passo Fundo, Passo Fundo, RS
  • Paulo Roberto Souza da Silveira Embrapa, Centro Nacional de Pesquisa de Suínos e Aves, Concórdia, SC
  • Carlos Henrique Cabral Viana Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Renato Valentim Tecnopec, São Paulo, SP

DOI:

https://doi.org/10.1590/S1413-95962004000200007

Keywords:

LH, Synchronization, Ovulation, Gonadotrophins, Sows

Abstract

The research, developed in a swine production system, examined the effectivity of luteinizing hormone (LH) in ovulation induction. Twenty four sows compose the control group and tirthy two sows received intramuscular aplication of 600 IU of eCG (Novormon 5000®), 24 h after weaning and 5 mg of LH (Lutropin - V ®), 56 h after eCG injection (treated group). Oestrus were observed twice a day, the ovulation detected by transcutaneous ultrasonography and ovulation rate (OR) determined by corpora lutea counting. The weaning-to-estrus interval (WEI) were reduced (P=0,01) by treatment (87,4 vs 98,5 h). The ovulations occured among 32 and 48 h (37,25 ± 3,65) after LH and were diferent (P < 0,0001) of control (63,67 ± 20,22, range: 32 - 104 h). The OR of treatment was similar (P = 0,2) on the control (23,16 ± 12,19 vs 20,08 ± 5,19, respectively).

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Published

2004-04-01

How to Cite

Candini, P. H., Moretti, A. de S., Zanella, E. L., Silveira, P. R. S. da, Viana, C. H. C., & Valentim, R. (2004). Assessment of the Luteinizing Hormon (LH) use in ovulation induction in sows. Brazilian Journal of Veterinary Research and Animal Science, 41(2), 118-123. https://doi.org/10.1590/S1413-95962004000200007

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