Can you tell me what you suggest if a man is infertile does that mean that he has no sperm?

Yes, here is...: A personal hx of impregnating any females in the past will suggest; otherwise, there's no quick easy way to tell. But remember: some 10-15% of couples may have the issue of possible infertility; some 50% of the time from women's factors, some 30% from male's factors, and some 20% from both. If still in doubt, go to see expert for a good history, physical exam, and semen analysis, and others.