title: Siberian live birth sex ratios and the SPrOO hypothesis.
authors.forename: P H
authors.initials: PH
authors.lastname: Jongbloet
mesh_terms: D001723:Birth Rate / Q000639:trends*; D005260:Female; D006801:Humans; D008297:Male; D012426:Russia; D012621:Seasons; D012744:Sex Ratio