HeredityGeneticsBehavior, AnimalElephantiasisFeeding BehaviorDiseases in TwinsHistory, 19th CenturyTwins, MonozygoticTwins, DizygoticHealth BehaviorSocial BehaviorBehaviorSexual BehaviorEnvironmentSexual Behavior, AnimalSwedenRisk FactorsChild BehaviorPhenotypeGenetic Predisposition to DiseaseGenes, RecessiveExploratory BehaviorAdolescent BehaviorFamily HealthQuestionnairesChild Behavior DisordersMaternal BehaviorSex FactorsBehavior TherapyPedigreeAge FactorsGenes, DominantStereotyped BehaviorGenetic LinkageBiological EvolutionPrevalenceAggressionAgonistic BehaviorGenetic VariationRisk-TakingChoice BehaviorNesting BehaviorGenotypePolymorphism, Single NucleotideSelf-Injurious BehaviorMotor ActivityAppetitive BehaviorSocial Behavior DisordersCohort StudiesPredatory BehaviorBehavior, AddictiveImpulsive BehaviorDrinking BehaviorIllness BehaviorCompulsive BehaviorRisk Reduction BehaviorConsummatory BehaviorInfant BehaviorGroomingReinforcement (Psychology)Time FactorsAttention Deficit and Disruptive Behavior DisordersHealth Knowledge, Attitudes, PracticeAnxiety