title: The Authors Respond.
authors.affiliation: Finnish Institute of Occupational Health, Centre of Expertise for Health and Work Ability, Helsinki, Finland, markku.sallmen@ttl.fi Department of Occupational and Environmental Medicine, Bispebjerg Hospital University of Copenhagen, Copenhagen, Denmark Finnish Institute of Occupational Health, Centre of Expertise for Health and Work Ability, Helsinki, Finland Department of Occupational Medicine and Epidemiology, National Institute of Occupational Health, Oslo, Norway Institute of Health and Society, University of Oslo, Oslo, Norway.
authors.forename: Markku
authors.initials: M
authors.lastname: Sallmén
authors.forename: Jens Peter
authors.initials: JP
authors.lastname: Bonde
authors.forename: Marja-Liisa
authors.initials: ML
authors.lastname: Lindbohm
authors.forename: Petter
authors.initials: P
authors.lastname: Kristensen
mesh_terms: D005260:Female; D005298:Fertility; D006801:Humans; D010298:Parity; D011247:Pregnancy; D012107:Research Design; D015983:Selection Bias