Although DH's sperm results aren't great, they aren't that bad. His volume is pretty close to normally, his morphology is actually really good (5% and above is normal) so its really only the motility. What was his actual count?
My DH has a motility of 36% (though it has varied from as low as 1% before) but his count is low and his morhology is at 1% and his sperm is highly damaged, so we're doing IVF/ICSI.
If his count is really high then IUI could be an option, if not, IVF/ICSI is usually needed for low motility.
Best of luck to you both and I hope that the vits improve his sperm for the next test.