title: Decreasing quality of semen.
authors: E
authors: E
authors: Carlsen
authors: A
authors: A
authors: Giwercman
authors: N E
authors: NE
authors: Skakkabaek
authors: N
authors: N
authors: Keiding
mesh_terms: D006801:Humans; D008297:Male; D012661:Semen / Q000502:physiology*; D013076:Sperm Count; D013094:Spermatozoa / Q000502:physiology*; D013997:Time Factors