the results indicate : ( 1 ) that the opiate antagonist naloxone is able to increase both the amplitude and the frequency of lh-rh discharge by the hypothalamus and ( 2 ) , when the lh-rh pulse frequency exceeds one pulse every 30 min. , discrete lh secretory episodes are not observed in peripheral blood .
C0020663
hypothalamus
C0023610
lh-rh