Evaluation of early embrionic development after natural mating using ultrasonography in bos indicus cows in the humid tropics of Costa Rica
Por:
Chavez, D, Maquivar, M, Galina, CS, Galindo, J, Molina, R, Molina-Montero, R, Estrada, S
Publicada:
1 jun 2008
Categoría:
Veterinary (miscellaneous)
Resumen:
Fifty-eight nursing Zebu cows averaging 5922 days postpartum were used to evaluate the early embryonic development by ultrasound under a natural mating system (bulls A to F). Three consecutive mating periods of 21 days were established. Sixty two percent of the animals were diagnosed as pregnant (36/58). During the first period (AB) 76% (27/36) of the animals become pregnant, 17% (6/36) during the second (CD) and 9% (3/36) in the last mating period (EF). Sixty two percent of the animals were true positives (animals found pregnant diagnosed by ultrasound (US), and conforming with the embryonic scale proposed by Rosiles et al. (2006); 12% (n=7) of false negatives (pregnant cows by US but not conforming with the scale); 2% (n=1) of false positives (pregnant cows, evaluated with US and conforming with the embryonic scale but not pregnant at the end of the study); and a 26% (n=15) of true negatives (not pregnancy evaluated with US). The sensitivity of the test was 97%, with a specificity of
Filiaciones:
Chavez, D:
Univ Nacl Autonoma Mexico, Dept Reprod, Fac Med Vet & Zootecnia, Mexico City 04510, DF, Mexico
Galina, CS:
Univ Nacl Autonoma Mexico, Dept Reprod, Fac Med Vet & Zootecnia, Mexico City 04510, DF, Mexico
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