Yes! A varicocele is a mass in the scrotum caused by defective valves in the testicular veins, which cause blood to pool, and the veins to expand. The pooling blood raises testicular temperature and affects testosterone and sperm production, which can affect fertility. Men can still have babies w/ this, but the odds are lower. Tx safely w/ varicocelectomy, ligation, or embolization.
Not clear . Infertility from varicocele is may occur if the testicle loses its blood supply or the tubules malfunction from increased pressure. Fixing it may not restore fertility, however. See http://www.Mayoclinic.Com/health/varicocele/ds00618/dsection=treatments-and-drugs.