title: Reanalysis of Bieber et al.'s 1962 data on sibling sex ratio and birth order in male homosexuals.
authors.affiliation: Clarke Institute of Psychiatry, Toronto, Ontario, Canada.
authors.forename: K J
authors.initials: KJ
authors.lastname: Zucker
authors.forename: R
authors.initials: R
authors.lastname: Blanchard
mesh_terms: D001722:Birth Order; D005190:Family; D005260:Female; D006716:Homosexuality / Q000523:psychology / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D017678:Sex Distribution; D012744:Sex Ratio