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Pattern of gonadotropin secretion and ultrasonographic evaluation of developmental changes in the testis of early and late maturing bull calves

Animal PhysiologyAnimal ReproductionTheriogenologyDevelopmental BiologyFertilityAnimal ScienceDevelopmental ChangesPhysiologyUltrasonographic EvaluationGonadotropin SecretionReproductive BiologyPublic HealthEndocrinologyMedicineAnimal BreedingReproductive HormoneReproductive Physiology