Progesterone levels during the normal and silent cycle in cattle in the Colombian tropics
Journal Title: Revista MVZ Cordoba - Year 2010, Vol 15, Issue 2
Abstract
Objective. Determine the sequence of changes in the levels of progesterone (NP) during the normal cycle (NC) and Quiet Cycle (CS). Materials and methods. 94 Females of the breed Holstein x Cebu (HC), Simmental x Cebu (SC), Romosinuano (R) and Cebu (C) were studied from puberty and during the first three estrous cycles. Blood samples were taken to determine concentrations of progesterone by radioimmunoassay, 184 progesterone profiles were determined for CN and 153 for CS. For the analysis of the information the statistical program SAS was used. Results. The R group presented a pattern of variations of the NP through the phases of the CN that has significant differences with the behavior of NP in the phases of CN groups SC, HC and C. Progesterone levels in each phase of the CS are consistent with a low luteal phase progesterone levels. Only significant differences were found in the late luteal phase when comparing CN with CS, however, numerical differences arise at all stages between these two types of cycles.. Conclusions. Progesterone concentrations have a marked effect on the presentation of CS, however, is difficult to define a concentration of progesterone that characterize each event (CN or CS), however, it is clear that progesterone affects the chances to be a favorable or unfavorable reproductive response.
Authors and Affiliations
Henry Grajales L, Ph. D *| Universidad Nacional de Colombia, Facultad de Medicina Veterinaria y de Zootecnia Departamento de Ciencias para la Producción Animal, Departamento de Ciencias para la Producción Animal, Grupo de investigación en Fisiología de la Reproducción. Bogotá, Colombia.Correspondencia: hagrajalesl@unal.edu.co, Aureliano Hernández V, Ph. D| Universidad Nacional de Colombia, Facultad de Medicina Veterinaria y de Zootecnia Departamento de Ciencias para la Producción Animal, Departamento de Ciencias para la Producción Animal, Grupo de investigación en Fisiología de la Reproducción. Bogotá, Colombia., Esperanza Prieto, M. Sc| Corporación Colombiana de Investigación Agropecuaria - CORPOICA. Colombia.
Keywords
Related Articles
- EP ID EP3157
- DOI -
- Views 382
- Downloads 17
Effects of corn oil on the volatile fatty acids in horses with induced gastric ulcers
Objetive. To determine the influence of corn oil on the volatile fatty acids (VFA) concentrations in the gastric juice in horses with phenylbutazone (PBZ) induced gastric ulcers and Correlate the gastroscopic findings wi...
Characterization of propolis from municipality of Caldas obtained through two collection methods
Objective. To determine the physicochemical characteristics and the antimicrobial activity in propolis from Apis mellifera, collected in the municipality of Caldas through two harvesting procedures. Materials and methods...
AGRONOMIC EVALUATION OF FORAGES SORGHUM (Sorghum vulgare) AND MILLO GENOTYPES FOR FEEDING BOVINE IN THE SINÚ VALLEY
Objective. To evaluate seven millo and five sorghum genotypes to determine forage yield and to use it in feeding bovine in Sinú valley, Colombia. Materials and methods. Sorghum (Sorghum vulgare) and millo seeds were hybr...
Subphrenic partial pericardiectomy in a dog due to quimodectoma
We describe the case of a Boxer dog, male 9 years old was presented with cardiac tamponade four times by recurrent pericardial effusions, which undertaken a partial pericardiectomy subphrenic as definitive treatment. Dur...
Curve control, development and phenotypic bad formations in poodle the city of Medellin
Objective. Quantifying phenotypic malformations and make a curve control and development of the breed Poodle puppies in the city of Medellin. Materials and methods. We analyzed 60 individuals, 30 females and 30 males wer...