hai iam kala iam having pcos, last month i used gonadotropins for ovulation.those are intas half ample for 3 dayas afterthat one ample for 4 days then one and half for another 4 days but iam having msf in ovaries but size not increased then thay changed ovitrop one and half ample for 4 days with out no use. doctor cancelled this cycle.now iam under overal.l,letrozole 1 tablet alternate days and decadron o.25mgper day.i askedabout this medication she ansered me that one cycle supression she told.once iused this letrozole for ovulation and iconceived in 2010.what is use of letrozole in my case.