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Photoperiod length and the estrus synchronization protocol used before AI affect the twin pregnancy rate in dairy cattle

Animal PhysiologyAnimal ReproductionTheriogenologyFertilityAnimal SciencePhysiologyPhotoperiod LengthGynecologyEstrus Synchronization ProtocolReproductive BiologyPublic HealthEndocrinologyMedicineAnimal BreedingDairy CattleReproductive Endocrinology