What is Azoospermia (Nil Sperm): Azoospermia is called when there is no sperm in semen. This type of semen disorder is found in approximately 3% of infertile men i.e. absent sperm. You should know that testis has two separate functions (i) Production of normal sperms in semen which needed for pregnancy & normal fertility. (ii) The other function of testis is production of male hormones i.e. testosterone ...