Iam facing unexplained infertility issue . iam 34 year old women with good weight 53kg . i have taken 4-5 cycle for letrozol n due to that last cycle overain hypersimualtation happened and 51*48 cyst is created which got drain in this period . i have done scan on 6th day which shows no cyst n follicular is 11*9mm. my husband report is normal, my ovary n hcg test was normal. only i have uterine polyp of 5mm . we were trying since 1.5 year with no luck . i was worry as age is increases too . doctor suggested to do iui . is it really required ? why i cant conceive naturally