IUI success? Low sperm quality.

Went to a fertility doctor and got an ultrasound, blood work, and my husband got a sperm analysis. My ultrasound was normal (uterus shape and size, ovaries, etc), but I have a low egg COUNT (which is ok for now) and my husband's sperm is below normal in that only 12% are swimming when 30% should be. Now we are going to be getting an IUI. Can someone please tell me if this worked for you and how long it took? Anyone have a similar story? I'm a little nervous. Specifically an IUI without the extra fertility drug (just the natural route)... much appreciated.