SURGICAL SPERM RETIEVAL TECHNIQUES :
Azoospermia is a condition where there are no sperm at all in a man’s ejaculated semen and there can be various reasons for this. Sperm production and delivery involves a system of tubes within the male reproductive system.
Azoospermia can be caused by an abnormality or blockage in the epididymis or the vas deferens - referred to as obstructive azoospermia. In these cases, sperm are being produced in the testes, they just can’t get out in the semen.
Sometimes however, sperm production in the seminiferous tubules does not occur at all or is happening at such a low level that sperm are not detectable in the ejaculate - referred to as non-obstructive azoospermia.