SciELO - Scientific Electronic Library Online

 
vol.13 número2Evaluación de los cambios ocasionados en espermatozoides bovinos por variaciones en el manejo de las dosis durante su manipulación en inseminación artificialResistencia a antimicrobianos en aislamientos de Escherichia coli de origen animal índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

Compartir


InVet

versión On-line ISSN 1668-3498

Resumen

VEIGA, P et al. Effect of different esters of estradiol used to synchronize ovulation on pregnancy rate to FTAI in Angus heifers. InVet [online]. 2011, vol.13, n.2, pp.39-45. ISSN 1668-3498.

Three experiments were conducted (EI, n: 209; EII, n: 208; y EIII, n: 188) using Angus heifers in order to compare the use of estradiol cypionate (EC) at device removal or estradiol benzoate (EB) 24 h after in a FTAI protocol. On day 0 heifers received a progesterone intravaginal device plus EB. On day 8, the intravaginal device was removed and heifers received a luteolytic dose of PGF. At device removal heifers were randomized to receive either EC at 0 h or EB at 24 h. On day 10, 50-53 h after device removal, fixed timed artificial insemination was performed using frozen/ thawed semen of proven fertility (3 bulls for EI and 2 for EII and EIII) and two inseminators. Pregnancy rates were not different between treatments (EI: 67.8%; EII: 59.2%; EIII: 58.4%) or inseminators (p>0.05); however a bull effect was observed in experiments I (B: 47.8%; F: 75.0%; M: 72.0%; p<0.05) and II (M: 68.8%; ME: 48.5%; p0.05). Interactions were not significant. In conclusion, according to our finding, estradiol cypionate could be used instead of estradiol benzoate to synchronize ovulation without affecting the pregnancy rate at fixed timed artificial insemination.

Palabras clave : Progesterone; Estradiol cipionate; Heifers; FTAI; Pregnancy.

        · resumen en Español     · texto en Español     · Español ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons