What are the tests for male fertility?

Semen Eval & bloods. The basic test is the semen analysis which is typically collected by masturbation into a sterile cup. This is best done in a specialized reproductive lab, as commercially done analyses are often not very reliable. Hormonal evaluation of testicular and pituitary hormones is also done, and in many cases a special physical examination to evaluate the testicles and scrotal sac (for varicose veins).
4 basics, one visit. Men require a history, physical exam, semen analysis and reproductive hormones (possible). From there decisions can be made regarding whether or not there is a "male factor" and its severity. The HISTORY is the single most important item, though.