the content of hypothalamic lhrh and concentration of lh in pituitary and plasma were measured on day 5 , 7 , 10 , 14 , 17 , 22 , 25 , 30 , 45 , 52 and 60 in male rats which were bilaterally castrated on day 2 .
C0020663
hypothalamic
C0023610
lhrh