Ways to improve sperm morph?

We found out that hubs has 0% normal morphology on his semen analysis 😩 however his count & motility are considered great. I started him on coq10 200mg a while ago but my RE told me to increase it to 400mg daily. He was also taking a regular mens multivitamin but we just switched to Mens Fertilaid last night. Has this helped anyone at all? Or what were some other ways you increased sperm morph? Supposed to have our first IUI in January after 2 miscarriages and I’m scared to death!!