title: Elusive fertility: fecundability and assisted conception in perspective.
authors.forename: R P
authors.initials: RP
authors.lastname: Jansen
mesh_terms: D005260:Female; D005298:Fertility; D005307:Fertilization in Vitro; D006801:Humans; D007246:Infertility / Q000628:therapy*; D011247:Pregnancy