Mice, Inbred C57BLMice, Inbred C3HAnimals, Outbred StrainsSpecies SpecificityMice, Inbred StrainsTestisSex CharacteristicsMice, KnockoutSpermatogenesisOrchiectomyTestosteroneMice, Inbred ICRInfertility, MaleOrgan SizeFertilityBody WeightSpermatozoaMice, TransgenicCastrationSex FactorsMice, Mutant StrainsEpididymisSpermatidsAggressionDisease Models, AnimalBehavior, AnimalSexual Behavior, AnimalSperm CountLiverPaternal Exposure