title: Smoking and sex selection?--Not proven yet.
authors: William H
authors: WH
authors: James
mesh_terms: D005260:Female; D012739:Gonadal Steroid Hormones / Q000097:blood; D006801:Humans; D011247:Pregnancy; D012744:Sex Ratio; D012907:Smoking
chemical_list: D012739:Gonadal Steroid Hormones