in a second series of studies , additional groups of ts-g1 subjects were primed during 5 days either with gnrh alone or with gnrh plus sex steroids ( ethinyl oestradiol 12.5 micrograms/12 h or testosterone enanthate 1.8 mg/kg body weight ( single dose ] , before nal administration , to investigate whether hypothalamic opioid activity might be unmasked by additional sex steroids .
C0023610
gnrh
C0020663
hypothalamic