the influence of testosterone on gonadotropin-releasing hormone ( gnrh ) secretion was assessed indirectly by altering the serum testosterone concentration of male rats and measuring gnrh release from their incubated hypothalami 1 wk later.gnrh release from hypothalami of castrated rats was 13.4+/-1.2 ( se ) pg/h , compared to 35.3+/-3.8 pg/h from hypothalami of intact rats ( p < 0.001 ) .
C0023610
gonadotropin-releasing hormone
C0020663
hypothalami