We moved straight to IVF with ICSI due to MFI. We have <1% chance of getting pregnant on our own or with IUI due to DH's sperm count <5 mil and that IUI would be a waste of our money (OOP for everything).
DH's horomonal levels were all normal, and the only thing they could find that might be affecting his sperm is that he's a CF carrier. So the RE and urologist didn't think anything would increase his numbers.
We had ER yesterday and the fertilization report today was that all 11 mature eggs were fertilized and are doing well.
Good luck deciding what to do and I hope you get pregnant soon.