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Abstract

The objective of this study was to determine the physiological, endocrine and productive response in lactating dairy cows under several series of artificial cooling at the beginning of the summer (June to July, 2011). Fourteen multiparous Holstein cows were assigned in one of two treatments:...

Author(s)
Leyva-Corona, J. C.; Thomas, M. G.; Rincón, G.; Medrano, J. F.; Calderón, A. C.; Avendaño-Reyes, L.; Hallford, D. M.; Rivera-Acuña, F.; Luna-Nevárez, P.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2016, 7, 4, pp 415-429
Abstract

Oestrus was synchronised in 28 heifers in Mexico, aged 15-18 months. Heifers with a high or low reproductive score were given oral treatment with MGA for 14 days, followed by an injection of PGF2α 19 days later (groups 1A and 1B respectively) or were treated with Crestar (norgestoment plus...

Author(s)
Quezada Casasola, A.; Ramírez Godínez, A.; Pérez Casio, F.; Avendaño Reyes, L.; Hallford, D. M.
Publisher
Asociación Interciencia, Caracas, Venezuela
Citation
Interciencia, 2004, 29, 11, pp 638-642