title: Second trimester maternal serum human chorionic gonadotropin and unconjugated oestriol levels in blacks and whites.
authors.forename: J L
authors.initials: JL
authors.lastname: Simpson
authors.forename: S
authors.initials: S
authors.lastname: Elias
authors.forename: C D
authors.initials: CD
authors.lastname: Morgan
authors.forename: L
authors.initials: L
authors.lastname: Shulman
authors.forename: E
authors.initials: E
authors.lastname: Umstot
authors.forename: R N
authors.initials: RN
authors.lastname: Andersen
mesh_terms: D044383:Black People; D006063:Chorionic Gonadotropin / Q000097:blood*; D004964:Estriol / Q000097:blood*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D011262:Pregnancy Trimester, Second; D044465:White People
chemical_list: D006063:Chorionic Gonadotropin; D004964:Estriol