Litter SizeBreedingReproductionWeaningOvulationLactationSwinePregnancyFertilityBody WeightPregnancy, AnimalParityAnimals, SucklingHybrid VigorSelection, GeneticBirth WeightSheepAnimal HusbandryAnimals, NewbornSex RatioCrosses, GeneticLeast-Squares AnalysisFetal DeathFetal ViabilityUterusWeight GainAnimal Nutritional Physiological PhenomenaEstrusOrgan SizeMilkEmbryonic and Fetal DevelopmentAnimal Population GroupsModels, GeneticEatingSexual MaturationArvicolinaeInbreedingQuantitative Trait, HeritableSus scrofaFetal ResorptionInsemination, ArtificialRandom AllocationCarnivoryHousing, AnimalAnimal FeedScrotumOvernutritionDicambaTrenbolone AcetatePhenotypeVaccines, ContraceptiveParturitionStillbirthFetusEmbryo ImplantationViviparity, NonmammalianBody CompositionEstrus DetectionSeasonsQuadrupletsFetal DevelopmentPlacentaOvulation InhibitionMaternal Behavior