Litter SizeSeasonsBreedingReproductionWeaningOvulationPregnancyLactationSwineFertilityBody WeightPregnancy, AnimalParityAnimals, SucklingHybrid VigorSheepSelection, GeneticBirth WeightAnimal HusbandryAnimals, NewbornSex RatioCrosses, GeneticEstrusLeast-Squares AnalysisFetal DeathFetal ViabilityUterusAnimal Nutritional Physiological PhenomenaWeight GainMilkOrgan SizeEmbryonic and Fetal DevelopmentAnimal Population GroupsSexual MaturationModels, GeneticArvicolinaeEatingInsemination, ArtificialInbreedingAnimal FeedQuantitative Trait, HeritableSus scrofaRandom AllocationHousing, AnimalParturitionFetal ResorptionCarnivoryScrotumTreesTrenbolone AcetatePhenotypeOvernutritionDicambaEstrus DetectionVaccines, ContraceptiveBody CompositionStillbirthFetusEmbryo ImplantationViviparity, NonmammalianSexual Behavior, AnimalRainTime FactorsOvaryGenotypeSoilFetal DevelopmentGonadotropins, EquineGenetic VariationMaternal BehaviorQuadrupletsEcosystemPlacentaAdipose TissueAnalysis of VarianceOvulation Inhibition