title: Parental age gap and child sex ratio--fact or fiction?
authors.forename: H
authors.initials: H
authors.lastname: Hakko
authors.forename: P
authors.initials: P
authors.lastname: Räsänen
authors.forename: M R
authors.initials: MR
authors.lastname: Järvelin
authors.forename: J
authors.initials: J
authors.lastname: Tiihonen
mesh_terms: D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D010290:Parents; D012744:Sex Ratio