<unk>  is the medical condition of a male not having any measurable level of sperm in his semen. It is associated with very low levels of fertility.<unk>  has two forms:
obstructive<unk> , where sperm are created, but cannot be mixed with the rest of the ejaculatory fluid due to a physical obstruction, and;
non-obstructive<unk> , where there is a problem with spermatogenesis, as in the condition of hyperprolactinemia.
congenital<unk> , where<unk>  is a manifestation of cystic fibrosis due to agenesis of vas deferens.<unk>  is a reported side effect of androgen drugs and corticosteroids because they suppress the hypothalamus release of GnRH and therefore FSH.  This causes<unk>  in males and amenorrhea in females.
Compare with aspermia.
Azoospermia
Logorrhoea
Penis enlargement
Testicular pain
Dysmenorrhea
Amenorrhea
Penile discharge
Penis pain