Improved reproductive outcomes in normogonadotropic oligomenorrheic women undergoing ovarian stimulation with intrauterine insemination: a retrospective cohort analysis of real-wor... oleh Sichen Li, Sichen Li, Yao Long, Yao Long, Chunyan Wang, Chunyan Wang, Rui Yang, Junye Lv, Zixin Chen, Jianqiao Liu, Jianqiao Liu, Haiying Liu, Haiying Liu, Mingzhu Cao, Mingzhu Cao