Azoospermia can be caused by a failure of sperm production by the testicles (secretory azoospermia) or by obstruction of the canals that carry the spermatozoa from the testicles to the semen (obstructive azoospermia).
The absence of sperm in the semen is called azoospermia, however there may be sperm production in the testicles without them being able to reach the sperm. In this case, an examination of the testis (biopsy) is necessary to evaluate if there is sperm production.
The possible causes of azoospermia are: hormonal disorders; genitourinary diseases; genetic diseases (without known causes); cryptorchidism, which is the situation where there is no descent from the testicles to the scrotum (testicular pouch) at birth; have been submitted to vasectomy and obstruction of the ducts (epididymis and vas deferens) that carry the sperm from the testicles to the sperm.
The specialist in human reproduction is the professional trained in the diagnosis and treatment of fertility problems.
