Recent research in male reproduction holds much promise for future clinical application. Research on the relationship between sperm, semen, and the immune system may provide novel approaches to treating immune-related infertility. Investigations of sperm motility have shed new light on these complex mechanisms and may lead to rational approaches to the improvement of sperm function. New assays for secretory products unique to the testis show potential as markers for specific testicular cellular functions. In-vitro fertilization promises to become a viable treatment option for couples with male-factor infertility. Research on male contraception may lead to the development of safe and reversible male contraceptives.
