Husband needs to see an urologist...

Samantha
My husband and I have been ttc for about 3 years now. We did get pregnant but had a miscarriage back in 2010 got married in 2013. Since then no success... so we went to go see an infertility doctor and did a semen analysis, doc said there is a problem but can be fixed and he needs to see an urologist. Does anyone know what the problem could be? Too impatient to wait around to see what the issue is. Anyone had any experience on this...