One thing I've noticed missing in a lot of these posts is mention of your CA125 level.
My fertility specialist put me on Zoladex injections for 3 months to "dry up" any remaining endo cells in my pelvic cavity after my lap.
He then did monthly blood tests to check my CA125 levels. Once it was below 35 it was technically inactive & then we could try the IVF.
As soon as he discovered the grade 4 endo in the lap he said IUI was completely out of the question due to the "pelvic factor" ie the toxins in the pelvic cavity that the endo cells give off.
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