title: [Decline of the quality of male semen].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D006801:Humans; D008297:Male; D012661:Semen; D013076:Sperm Count; D013081:Sperm Motility
vernacular_title: Verminderung der Qualität des männlichen Samen.