title: Significance of sib sex ratios in testing the hypothesis that some sex-biased congenital malformations are caused by unusual maternal hormone profiles.
authors.forename: William H
authors.initials: WH
authors.lastname: James
mesh_terms: D000015:Abnormalities, Multiple; D005260:Female; D012739:Gonadal Steroid Hormones / Q000097:blood*; D006801:Humans; D008297:Male; D012744:Sex Ratio; D035781:Siblings
chemical_list: D012739:Gonadal Steroid Hormones