Mice, Inbred BALB CSexual Behavior, AnimalConjugation, GeneticCopulationCrosses, GeneticReproductionBreedingFertilityBALB 3T3 CellsInbreedingFetal ResorptionInseminationMice, Inbred StrainsMating Preference, AnimalSpecies SpecificityPaternityMice, Inbred C57BLR FactorsSpleenHybridization, GeneticMice, Inbred DBALeishmania majorPlasmidsPoeciliaHybrid VigorMice, Inbred CBALitter SizeSex RatioEmbryo Loss