[Maternal serum screening for Down syndrome].
Nørgaard-Pedersen
B
B
Statens Serum Institut, Klinisk Biokemisk Afdeling.
Christiansen
M
M
D003718:Denmark; D004314:Down Syndrome / Q000097:blood / Q000517:prevention & control*; D005260:Female; D017408:Guidelines as Topic; D006801:Humans; D008403:Mass Screening; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods