title: Parental coital rates and Down syndrome.
authors.forename: W H
authors.initials: WH
authors.lastname: James
mesh_terms: D000328:Adult; D003075:Coitus; D004314:Down Syndrome / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D012725:Sexual Behavior