title: Increase of ectopic pregnancy in Finland--combination of time and cohort effects.
authors.forename: P A
authors.initials: PA
authors.lastname: Marchbanks
authors.forename: J F
authors.initials: JF
authors.lastname: Annegers
authors.forename: C B
authors.initials: CB
authors.lastname: Coulam
mesh_terms: D015331:Cohort Studies; D005260:Female; D005387:Finland; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology* / Q000209:etiology