to determine whether the pituitary-gonadal deficiency in heroin addicts is related to heroin 's effect on the hypothalamus , the authors administered gonadotropin hormone-releasing hormone ( gnrh ) to 10 male heroin addicts and 5 controls and measured follicle-stimulating hormone ( fsh ) and luteinizing hormone ( lh ) response .
C0020663
hypothalamus
C0023610
gnrh