Community-based screening for Down syndrome in the first trimester using ultrasound and maternal serum biochemistry.
W J A
WJ
Gyselaers
A J
AJ
Vereecken
J G
JG
Nijhuis
D003153:Community Health Services; D003625:Data Collection / Q000592:standards; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*