Hi Lou Lou,

In my cycles we used clomid and had the trigger once the follicle was a good size (OPKs never worked well for me, only got a line twice, and even then not nearly as dark as the control) and then 24-36 hours later the IUI, and got a positive on out 4th round. Also, I usually had a scan at the time of IUI, and most of the time the follicle was still there with the egg, even 24-26 hours after the trigger.
We also didn't have extra BDing, so we know that the IUI worked.

Hope this puts your mind at ease.