The semen analysis indicates abnormal sperm forms and low motility. Its abnormal and is the source of your infertility. Often this is due to a varicocele so he needs to see a urologist. If this is the case, it may be able to be surgically corrected to improve the analysis. Vitamins do not help. IUI and IVF are both helpful. You would be more likely to conceive with either, but unlikely to conceive naturally.