title: Can a negative time trend of sperm density be explained by changes in reproductive pattern?
authors.forename: Henrik
authors.initials: H
authors.lastname: Hjollund
authors.forename: Lone
authors.initials: L
authors.lastname: Storgaard
authors.forename: Jens Peter
authors.initials: JP
authors.lastname: Bonde
authors.forename: Jørn
authors.initials: J
authors.lastname: Olsen
mesh_terms: D003198:Computer Simulation; D003718:Denmark; D005260:Female; D005298:Fertility / Q000502:physiology; D006801:Humans; D008297:Male; D015233:Models, Statistical; D011247:Pregnancy; D013076:Sperm Count / Q000639:trends*; D013997:Time Factors