The chances of normal conception if oligoarthropathy, the preservation of male fertility

Hello. My husband a year ago found oligomerisation. One course of treatment have passed, nothing has changed, going in the spring to continue, please tell me what are the chances to conceive a child if husband 30 years? It's not too late to get treatment?

Response: "Hello! Fertility in men persists into old age. But there are forms of male infertility, which at a young age does not allow men to become fathers. Need to see full analysis of semen with MAR-the test, ultrasound of the scrotum with Doppler. Consult in person at andrologist (urologist). I wish you health"