The objective of this study was to explore whether the vasopressin and oxytocin hormones were synthetized in the adrenal cortex gland cells, via theirs precursor molecules phase, neurophysin, by using one of immunoperoxidase staining methods. Twenty adult albino rats of the Lembaga Makanan Rakyat strain (LMR), weighting between 150-250 g were used in this investigation, and divided into two gro…