Pcod and infertility. Mntrng my amh 6.

Hi I'm married for 3 years now  trying to conceive from 2 yrs ihave pcod and I dnt have periods until I take medicine for itmy hsbnd sperm count is normal with low sperm mrphlgy of 2% we have tried ovulation induction pills with timed intercourse where follicular study was not done my doctor it not so necessary and we had 6 failed OI cycles.then she sugstd dgnst lapro hysterescopy everything was nrml in it and then again she told to try 3 more cycles with no follicular study they also failed.she then suggested to for fertility where IUI was done and we had follicular study there.to  surprise my et thickness was not upto the mark.it increased  10mm with medcns.3 cycls failed.my doubt is  my OI cycles failed due to et thickness prblm even tough we are trying for 2 yrs I dnt ovulate on my own bcoz of pcod so we have tried 9 OI n 3 IUI which means 1 year for trying .have we tried enough of before moving to IVF?can we try few OI cycles with follicular mntrng  my amh 6.98 AFC 8 in  each ovar