Not able to convince, Doctor advised IVF

Background :- My age 31, wife's age 30, getting married 3 years ago, trying for conceive for last 1.5 years.. till this date wife did basic medical checkups( like BP, thyroid , blood checkup etc all normal), laparoscopy ( normal) , 2 times HsG injunction. My semen analysis also done ( normal ). . Normal cycle days 2-3 days ( painful but on regular intervals) Issue :- Wife facing issue of overyion cyst for last 6 months on 16 to 19th of MC days. Due to which rupture does not happen. Doctor gave us some tablates for this but no use , cyst happen again. Now doctor advised us to go for IVF .. 1. Is the IVF is the only way to overcome the issue like cyst. 2. Why IUI not suggested ?? 3. And , what happened if we go for IVF / IUI or etc and cyst again appears ?? 4. Pls pls advice what to do .. i am getting panic day by day .. wife says IVF is very painful and we should avoid it... I am getting helpless.