in order to investigate the possible influence of prolactin ( prl ) at the hypothalamic level , serum lh and fsh pulsatility was studied in 16 male patients with prolactinomas , normally lh responders to gnrh ( group a ) : 8 of them were untreated ( group a1 ) and 8 had undergone previous unsuccessful pituitary treatments ( group a2 ) .
C0020663
hypothalamic
C0023610
gnrh