Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleOlder-sibling and younger-sibling sex ratios in Frisch and Hviid's (2006) national cohort study of two million Danes.AuthorsBlanchard RPublicationArchives of sexual behavior, 2007, Vol 36, Issue 6, p860ISSN0004-0002Publication typearticleDOI10.1007/s10508-006-9154-z