title: Maternal serum total hCG and free beta-hCG in the first trimester from trisomy 21 pregnancies.
authors.forename: B
authors.initials: B
authors.lastname: Eiben
authors.forename: W
authors.initials: W
authors.lastname: Hammans
authors.forename: S
authors.initials: S
authors.lastname: Keuter
authors.forename: R
authors.initials: R
authors.lastname: Goebel
authors.forename: F
authors.initials: F
authors.lastname: Louwen
authors.forename: J T
authors.initials: JT
authors.lastname: Epplen
mesh_terms: D000328:Adult; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood*; D004314:Down Syndrome / Q000097:blood* / Q000175:diagnosis; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D011261:Pregnancy Trimester, First; D012016:Reference Values
chemical_list: D018997:Chorionic Gonadotropin, beta Subunit, Human