Yep, stimulated would mean being on meds. What meds though, I'm not sure.
IUI wasn't even mentioned by my FS and he recommended IVF straight away. I'm guessing mainly because of the success rates. IUI has a 10% success rate and IVF 40% (for my age group).
I really hope you don't have to go down that path Racheal. Fingers crossed for a BFP this cycle.