title: [Epidemiological and etiological aspects of excretory azoospermia].
abstract: The average spermatozoa concentration in the ejaculate fell progressive even if sharply in the last 50 years. The azoospermia, described as the complete spermatozoa absence in the sperm, has a variable incidence between 10 and 20% in the clinical picture of the male infertility. The authors outline an etiological classification of the azoospermia and analyse the epidemiological and etiological aspects of the obstructive azoospermia.
authors.affiliation: U.D. Urologia, Modulo di andrologia, Ospedale Regionale della Valle d'Aosta.
authors.forename: T
authors.initials: T
authors.lastname: Enria
authors.forename: M
authors.initials: M
authors.lastname: Favre
authors.forename: R
authors.initials: R
authors.lastname: Enria
mesh_terms: D006801:Humans; D015994:Incidence; D007248:Infertility, Male / Q000209:etiology; D008297:Male; D009845:Oligospermia / Q000453:epidemiology* / Q000209:etiology*; D013076:Sperm Count