Objective To investigate the effect of long-term use of Nilestriol (over 5 years) on the female genital system including the vagina, cervix, uterus and ovaries of postmenopausal women.

• 目的观察绝经后长期应用尼尔雌醇（5年以上）对妇女生殖系统包括阴道、宫颈、子宫及卵巢的影响。