title: Commentary: Fertility Behavior and Studies of Fecundity Trends.
authors: From the Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark.
authors: Niels
authors: N
authors: Keiding
authors: Thomas H
authors: TH
authors: Scheike
mesh_terms: D005260:Female; D005298:Fertility; D006801:Humans; D010298:Parity; D011247:Pregnancy; D012107:Research Design; D015983:Selection Bias