So in our study, we use transvaginal ultrasound to evaluate the effect of letrozole in women with polycystic ovary syndrome, to get more theory supports for the correct treatment to PCOS.

• 因此本研究利用经阴道超声评估来曲唑对多囊卵巢综合征患者的治疗作用，旨在为PCOS患者的合理用药提供理论依据。