title: Prenatal screening for Down syndrome in pregnancies at risk for α-thalassemia.
authors.forename: Dong-Zhi
authors.initials: DZ
authors.lastname: Li
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood*; D005260:Female; D006453:Hemoglobinopathies / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011266:Pregnancy-Associated Plasma Protein-A / Q000378:metabolism*; D000509:alpha-Fetoproteins / Q000378:metabolism*
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins; D011266:Pregnancy-Associated Plasma Protein-A