Induction of ovulation in Mangalarga Marchador mares by hCG or GnRH
Acta sci. vet. (Impr.)
; 46: 1-6, 2018. tab, graf
Article
em En
| VETINDEX
| ID: biblio-1457816
Biblioteca responsável:
BR68.1
Localização: BR68.1
ABSTRACT
Background:
Induction of ovulation is a key procedure for horse assisted reproduction technologies, such as for artificial insemination (AI) and embryo transfer. The application of hCG remains as the primary ovulation-inducing agent for horse assisted reproduction, but alternatives are in demand to avoid its adverse effects, such as loss of ovulation-inducing efficiency over multiple applications by hCC-antibody production. Despite reports on alternative ovulation-inducing agents, pair-wise comparisons of such agents under similar conditions have been limited. Under such scenario, the work was aimed to determine the efficiency of both hCG and Buserelin at inducing ovulation in Mangalarga Marchador mares raised in the Northeast of Brazil under an AI program.Materials, Methods &Results:
Mares were initially selected based on their reproductive performance, the absence of clinical-reproductive alterations and adequate body condition score. Mares in diestrus were randomly distributed in three experimental conditions, received 5 mg of Dinoprost and were monitored daily for estrus detection. After estrus detection, ovaries were monitored by ultrasonography, in 12-h intervals, until the follicle reached 35 mm. At this time-point, ovulation was induced with 0.042 mg of Buserelin endovenously, with 3,000 IU hCG by an intramuscular shot, and control mares received 2 mL of saline solution, also by an intramuscular shot. Both hCG and Buserelin displayed similar efficiencies (P > 0.05) for induction of ovulation and that both agents were effective (P 0.05) from those found in the Control. All ovulations occurred within a 72-h period after treatment.[...]Palavras-chave
Texto completo:
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Base de dados:
VETINDEX
Assunto principal:
Indução da Ovulação
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Hormônio Liberador de Gonadotropina
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Gonadotropina Coriônica
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Cavalos
Limite:
Animals
Idioma:
En
Revista:
Acta sci. vet. (Impr.)
Ano de publicação:
2018
Tipo de documento:
Article