Hi
My DH's cousin got pg on clomid. I was on it for 18months as I wasn't ovulating prior. DH had a sperm test which revealed that he had low count, however it wasn't until they did an in depth analysis of his sperm that they found that 98% of his sperm were abnormal - therefore we had ICSI. It would have saved us alot of time, money and heartache had they done the indepth test first.
As said by others - it really depends on what the issues are.
Goodluck!