The objective of this descriptive-explorative study was to explore whether the oxytocin hormone can be identified in the thymus by using immunoperoxidase staining methods and primary antibody neurophysin. Ten adult rats (Rattus norvegicus), either male or female of Lembaga Makanan Rakyat strain, weighing between 200-250 g were used in this study. All rats, without any treatment were killed by d…