title: Declining human fertility?
authors.forename: T K
authors.initials: TK
authors.lastname: Jensen
authors.forename: N
authors.initials: N
authors.lastname: Keiding
authors.forename: T
authors.initials: T
authors.lastname: Scheike
authors.forename: R
authors.initials: R
authors.lastname: Slama
authors.forename: A
authors.initials: A
authors.lastname: Spira
mesh_terms: D000328:Adult; D000367:Age Factors; D005260:Female; D005298:Fertility; D006069:Gonorrhea / Q000453:epidemiology; D006801:Humans; D007248:Infertility, Male / Q000453:epidemiology; D008297:Male; D011247:Pregnancy / Q000706:statistics & numerical data*; D012907:Smoking; D013094:Spermatozoa / Q000502:physiology; D013548:Sweden; D013997:Time Factors