title: Decreasing sperm counts? A critical (re)view.
authors.affiliation: Institute of Reproductive Medicine of the University (WHO Collaborating Center for Research in Human Reproduction), Münster, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Lerchl
authors.forename: E
authors.initials: E
authors.lastname: Nieschlag
mesh_terms: D000367:Age Factors; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D010507:Periodicity; D012016:Reference Values; D012744:Sex Ratio; D012746:Sexual Abstinence; D013076:Sperm Count / Q000379:methods; D013094:Spermatozoa / Q000502:physiology*; D013997:Time Factors