What Should I Do For A Follicle To Achieve Maturity ?

my question is for infertility . my pt have b/l pcos . marriage history 12 yrs. one time she conceived without medicine in 2nd year.2nd time she conceived about 5 yrs ago with hormonal therapy and clomifine. but both time she had miscarriage . after that she was on fertility drugs last year but not having any best size of follicle .she drop her treatment . from last august she was again on hormonal therapy for 3 months from me than 3 cycles on fertomid but having no result. periods are also not regular till now. this time i gave her letrozole from 3rd day with inj. FSH 75 iu on 7th day.today means the 9 th day largest size of follicle in lt ovary is 9mm.i want to add this also that at 9th day this time only she reach upto 9 mm before this she only reached 6mm in 2 cycles. i also give 2nd inj. FSH 75 iu today. i m still confused.i call her the day after tomorrow for last inj.FSH and 2nd tvs.my question is ,Is there any chance for follicle reach upto best size .?Should i increase the dose? and give it daily instead of alternate day? please send me ur opinion because i have only one day to take any decision. sorry i forgot that her test FSH,LF,S.PROLACTIN,S.INSULIN ARE NORMAL.and from august she is also taking metformin 500 mg tds.thanku