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Factors affecting duration of the expulsive stage of parturition and piglet birth intervals in sows with uncomplicated, spontaneous farrowings

Animal PhysiologyReproductive SuccessAnimal ReproductionDevelopmental BiologyFertilityExpulsive StageTheriogenologyAnimal ScienceMedicineGynecologyReproductive BiologyPublic HealthPiglet Birth IntervalsSpontaneous FarrowingsEmbryologyReproductive Physiology