Semen analysis and questions

Dear Dr., I would appreciate your assistance with the interpretation of these semen analysis results. My husband is 34 years old, I am 35 years old, have been married for 8 years and been trying to conceive for over 6 months now. Abstinence: 4 days Spermatozoa, normal morphology, % : 11 standard range >=4% WBC count, semen: 1 Standard range <=1 mil./ml Semen volume: 2.2 Standard range >=1.5 ml Sperm count, semen: 12 Standard range >=15 mil./ml Spermatozoa, immotile %: 30 Sperm motility 1+ and 2+: 26 Standard range >=40 Sperm motility 3+: 33. Sperm motility 4+: 11 Standard range >=32% Total motile sperm count: 12 Standard range >=39 mil./Spec I would appreciate knowing how these results affect the chances of naturally conceiving and whether we should start considering IUI. Thank you, Amber