title: On the importance of being earnest. Decline in semen quality among fertile men in Paris during the past 20 years.
authors.affiliation: MRC Reproductive Biology Unit, Edinburgh, UK.
authors.forename: R M
authors.initials: RM
authors.lastname: Sharpe
mesh_terms: D005298:Fertility; D006801:Humans; D008297:Male; D010297:Paris; D012661:Semen / Q000166:cytology* / Q000502:physiology; D013076:Sperm Count; D013081:Sperm Motility / Q000502:physiology; D013094:Spermatozoa / Q000166:cytology* / Q000502:physiology