title: Photoperiodism and reproduction in golden hamsters: circadian organization and the termination of photorefractoriness.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D002940:Circadian Rhythm; D006224:Cricetinae / Q000502:physiology*; D003624:Darkness; D008027:Light; D008297:Male; D008647:Mesocricetus / Q000502:physiology*; D009929:Organ Size; D012098:Reproduction; D013737:Testis / Q000033:anatomy & histology