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Prediction of stillbirth from biochemical and biophysical markers at 11-13 weeks.
Mastrodima S, Akolekar R, Yerlikaya G, Tzelepis T, Nicolaides KH.
Ultrasound Obstet Gynecol 2016;48:613-7. pdf -
Screening for adverse pregnancy outcome by ductus venosus Doppler at 11-13+6 weeks of gestation.
Maiz N, Valencia C, Emmanuel EE, Staboulidou I, Nicolaides KH.
Obstet Gynecol 2008;112:598-605.