Changes in milk yield in the proximity of AI as predictors of conception risk


  • P. Pinedo Department of Animal Sciences, Colorado State University, Fort Collins, CO 80523
  • J. E. P. Santos University of Florida, Gainesville, FL 32611
  • G. Schuenemann College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210
  • R. Bicalho College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
  • K. Galvao University of Florida, Gainesville, FL 32611
  • R. Chebel University of Florida, Gainesville, FL 32611; College of Veterinary Medicine, Ross University, St. Kitts, West Indies



milk yield, dairy cattle, lactation, calving, AI, artificial insemination, milk production, conception


Adequate increments in milk yield during early lactation are an indication of proper transition from the negative energy balance after calving to more stable stages as lactation progresses. Most research in this area has focused on the transition period, encompassing the 3 weeks before and after calving. However, changes in milk yield in proximity of AI may better predict the probabilities for a successful insemination. We hypothesize that the change in milk yield in 2 consecutive monthly test days around AI is associated with potential fertility of insemination. Therefore, our objective was to test the effect of magnitude of change in milk production in the proximity of AI on the risk of conception in a large population of Holstein cows. The potential associations with cow survival also were analyzed as a secondary objective.







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