title: [Secular trends in a decreased sperm count in the ejaculate in man].
authors: Ustav pro péci o matku a dítĕ, Praha.
authors: J
authors: J
authors: Presl
mesh_terms: D005298:Fertility; D006801:Humans; D008297:Male; D013076:Sperm Count
vernacular_title: Sekulární trend v poklesu poctu spermií v ejakulátu muze.