these results indicate a transient fall in the inhibitory opioidergic tone upon lh secretion as the normal age of puberty approaches , that the ability of opiates to alter lh release in adulthood may depend upon testicular steroids secreted during the peripubertal period , and that the lh responses do not reflect general changes in the neuroendocrine response to opiates after castration since the prolactin response to morphine remains intact in rats castrated before and after puberty .
C1327616
secreted
C0033371
prolactin