title: Triploidy, imprinting, and hCG levels in maternal serum screening.
authors: B
authors: B
authors: Eiben
authors: W
authors: W
authors: Hammans
authors: R
authors: R
authors: Goebel
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood*; D015193:Chorionic Villi Sampling; D003582:Cytogenetics; D005260:Female; D005820:Genetic Testing; D018392:Genomic Imprinting; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology; D011123:Polyploidy; D011247:Pregnancy / Q000097:blood*
chemical_list: D006063:Chorionic Gonadotropin