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Using a 5-d controlled internal drug-release (CIDR)-Cosynch resynchronization protocol, the objective of this study was to determine the effect of the initial GnRH injection on pregnancy per artificial insemination (P/AI) to the second artificial insemination in lactating Holstein dairy cows. On...

Spencer, J. A.; Carnahan, K.; Shafii, B.; Price, W. J.; Dalton, J.; Ahmadzadeh, A.
Elsevier Inc., Philadelphia, USA
Journal of Dairy Science, 2018, 101, 9, pp 8524-8531