title: [Has the quality of sperm decreased during the last 50 years?].
authors.affiliation: Hôpital de Bicêtre, Le Kremlin-Bicêtre.
authors.forename: A
authors.initials: A
authors.lastname: Spira
authors.forename: B
authors.initials: B
authors.lastname: Ducot
authors.forename: P
authors.initials: P
authors.lastname: Thonneau
mesh_terms: D000328:Adult; D004777:Environment; D006801:Humans; D008297:Male; D008875:Middle Aged; D013076:Sperm Count
vernacular_title: La qualité du sperme a-t-elle baissé au cours des cinquante dernières années?