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Prediction of small-for-gestation neonates from biophysical and biochemical markers at 11-13 weeks.
Karagiannis G, Akolekar R, Sarquis R, Wright D, Nicolaides KH.
Fetal Diagn Ther 2011;29:148-54. -
Screening for trisomy 18 by fetal nuchal translucency and maternal serum free beta -hCG and PAPP-A at 10-14 weeks of gestation.
Tul N, Spencer K, Noble P, Chan C, Nicolaides K.
Prenat Diagn 1999;19:1035-42.