Intrafollicular LH administration in dairy heifers treated with a GnRH agonist

J. Mala, J.-F. Beckers, N. Melo de Sousa, E. Indrova, M. Lopatarova, R. Dolezel and S. Cech
Additional contact information
J. Mala: University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
J.-F. Beckers: University of Liege, Liege, Belgium
N. Melo de Sousa: University of Liege, Liege, Belgium
E. Indrova: University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
M. Lopatarova: University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
R. Dolezel: University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
S. Cech: University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic

Veterinární medicína, 2013, vol. 58, issue 2, 81-86

Abstract: The aim of this study was to evaluate the effect of intrafollicular treatment (IFT) with different doses of luteinising hormone. Experimental heifers were treated with a single deslorelin implant to desensitise gonadotroph cells of the pituitary gland. Thereafter, follicular development was stimulated by exogenous FSH treatment. Intrafollicular treatment with 10, 5, 1 and 0.01 µg LH was performed on one single follicle while other follicles remained untreated. Human chorionic gonadotrophine (2000 UI) was administered intravenously as a control. Ovulation and development of the corpus luteum occurred after all intrafollicular treatments with 10 and 5 µg LH. After IFT using 1 µg of LH 75% animals (3/4) ovulated. The dose of 0.01 µg was not followed by any ovulation whereas control treatments with hCG were followed by an ovulation of the majority of follicles present in the ovaries. In conclusion, IFT with different doses of LH (greater than 0.01 µg) is capable of inducing ovulation.

Keywords: intrafollicular treatment; double channel system; luteinising hormone; deslorelin; cattle (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://vetmed.agriculturejournals.cz/doi/10.17221/6700-VETMED.html (text/html)
http://vetmed.agriculturejournals.cz/doi/10.17221/6700-VETMED.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlvet:v:58:y:2013:i:2:id:6700-vetmed

DOI: 10.17221/6700-VETMED

Access Statistics for this article

Veterinární medicína is currently edited by Ing. Helena Smolová Ph.D.

More articles in Veterinární medicína from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().