The number of hypothalamus SON, PVN, LHA positive NOS neurons decreased dramatically after estrogen replacement therapy, and no visible difference can be detected compared with the normal female rats.

• 3．雌激素补充一月、两月组(实验组)，视上核、室旁核和外侧区的NOS阳性细胞数与卵巢切除组相比显著下降，与正常对照组比较无明显变化。