Poor morphology-IUI?

Hey all. After a long 2 yrs of TTC we finally got a semen analysis done for my husband. (Could’ve been done in March but THANKS COVID!) he has the poorest morphology you can have, but he has a ton and motility is great. Has anyone had to do IUI for this or straight to IVF? He’s taking a ton of fish oil to help this issue hopefully in a natural way but I’m not banking on it.