oxytocin , vasopressin , cortisol and testosterone levels in the plasma were measured by radioimmunoassay in intact male goats as well as in prepubertally castrated goats injected daily , for 2 weeks , with oil vehicle and then , for 4 weeks , with testosterone propionate in oil to study the influence of gonadal steroids on posterior pituitary hormones .
C0030095
oxytocin
C0032017
posterior pituitary hormones