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Silent ovulation, based on walking activity and milk progesterone concentrations, in Holstein cows housed in a free-stall barn

Animal PhysiologyHolstein CowsAnimal ReproductionTheriogenologyFertilitySilent OvulationAnimal NutritionAnimal SciencePhysiologyLivestock ProductionGynecologyLivestock HealthReproductive BiologyPublic HealthEndocrinologyMedicineMilk Progesterone ConcentrationsReproductive Endocrinology