It is known that gonadotropin - releasing hormone ( gnrh ) modulates the synthesis and secretion of the gonadotropins ( lh and fsh ) by combining with its receptor ( gnrhr ) on the membrane of gonadotrophs 一般认为,下丘脑分泌的促性腺激素释放激素( gnrh )通过存在于促性腺激素细胞细胞膜上的gnrhr来调节垂体促性腺激素的合成与分泌。