Methods: Postmenopausal women were randomized as nine cases (group A) receiving 0.0 mg ethinyl estradiol (EE) and ten cases (group B) receiving EE 0.0 mg for three months.

Methods: Postmenopausal women were randomized as nine cases (group A) receiving 0.0 mg ethinyl estradiol (EE) and ten cases (group B) receiving EE 0.0 mg for three months.

方法：将绝经后妇女9例随机分为两组，口服炔雌醇（EE）0．0mg9例为A组，口服EE0．0mg0例为B组，共服药个月。