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Testosterone production and social environment vary with breeding stage in a competitive female songbird

Testosterone ProductionBreeding BehaviorSocial Environment VaryBehavioral SciencesReproductive SuccessFitnessSocial BehaviorEvolutionary BiologyEducationAvian EvolutionSexual SelectionCompetitive Female SongbirdReproductive BiologyPublic HealthReproduction ResponseAnimal BehaviorReproductive Endocrinology