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The aim of this study was to determine the relationship between observed estrous-related behavior, activity clusters (AC; detected by automatic activity monitor), endocrine profiles, and ovulation time. Twenty-one cows in estrus (after 2 cloprostenol treatments, 11 d apart) and 12 nonsynchronized...

Aungier, S. P. M.; Roche, J. F.; Duffy, P.; Scully, S.; Crowe, M. A.
Elsevier Inc., Philadelphia, USA
Journal of Dairy Science, 2015, 98, 3, pp 1666-1684