opk's have made me crazy in the past, along with temping (one morning i threw my themometer across the room, it ended up under the dresser, where it lays right now!

) luckly, with the trigger shot, there is no question when you O, so i don't need to use the stupid OPKs (just to get my first color change).
the trigger shot is the same hormone the developing embie makes and is detected in pregnancy tests. it causes all the large follies to rupture. my dr says there is no question if i O or not when i use that shot. i do O. they do this so they can time IUI better and trigger O when the follies and estrogen levels are right.
the

should cover the bases. if the first try, DH's numbers are low due to

soon before iui, then you can always abstain for a bit longer the next try (hopefully you don't need a next try!). i think it is too bad that everyone can't get u/s done to look at the follies, and bloods. i know for some it is $, others it is the dr. it just tells you if the clomid is doing what it should be.......