title: Reproduction and level of intelligence.
abstract: The study was conducted in a representative Swedish rural-urban population sample of 3,064 persons. The IQ factor was determined directly by a single well established procedure. No systematic association between IQ level and the mean number of children was found.
authors.affiliation: Department of Environmental Hygiene, Göteborg University, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Nyström
authors.forename: L O
authors.initials: LO
authors.lastname: Bygren
authors.forename: D R
authors.initials: DR
authors.lastname: Vining
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D012098:Reproduction; D012424:Rural Population; D012737:Sex Factors; D012923:Social Class; D014505:Urban Population