title: Ratio of boys to girls at birth.
authors.forename: Jens Peter Ellekilde
authors.initials: JP
authors.lastname: Bonde
authors.forename: Allen
authors.initials: A
authors.lastname: Wilcox
mesh_terms: D004781:Environmental Exposure; D005260:Female; D006801:Humans; D007246:Infertility / Q000503:physiopathology; D008297:Male; D012744:Sex Ratio; D013081:Sperm Motility / Q000502:physiology; D013094:Spermatozoa / Q000502:physiology