First and second trimester antenatal screening for Down's syndrome: the results of the Serum, Urine and Ultrasound Screening Study (SURUSS).
Wald
N J
NJ
Department of Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, Bart's and the London School of Medicine and Dentistry, London EC1M 6BQ, UK
Rodeck
C
C
Hackshaw
A K
AK
Walters
J
J
Chitty
L
L
Mackinson
A M
AM
D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000652:urine; D005260:Female; D005865:Gestational Age; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D011247:Pregnancy; D011256:Pregnancy Outcome; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*; D013997:Time Factors; D014463:Ultrasonography