Veterinary MedicineAnimal SciencesVeterinary PhysiologyAnimal WelfareReproductive PhysiologyRuminant MedicineAnimal HusbandryOxytocin PhysiologyRuminant Reproductive MedicineBovine Reproductive BehaviorCow Reproductive PhysiologyOxytocin SecretionPlasma Oxytocin MeasurementReproductive Hormone Assays