hi my name is anvita age 25 weight 90 kgs. i had a fistula surgery in july 2010.doctor had asked me not to conceive for 6 months.we have beeen trying since october.i had a regular 28 days cycle.but from october its varying from 29-34 days.due to which i did a transvaginal scan and everything is normal.my gynaec has asked me 2 be on letrozole frm 3rd to 7th day of my periods.i want to know any other thing that i should do.