DH has zero sperm count... help!!!

Mr

My DH was on testosterone injections for almost a year. We have been ttc for 4 months now. He finally stopped the injections 2 months ago and he started taking fertilaid and count boost. he went for a semen analysis last week, and just got the results saying he has zero sperm in his sample. Does anyone have experience with this? I have read they can put men on HCG and clomid to boost counts... has this worked for anyone before?