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Expanded conventional first trimester screening.
Carmichael JB, Liu HP, Janik D, Hallahan TW, Nicolaides KH, Krantz DA.
Prenat Diagn 2017;37:802-807. pdf -
First-trimester contingent screening for trisomies 21, 18 and 13 by biomarkers and maternal blood cell-free DNA testing.
Nicolaides KH, Syngelaki A, Poon LC, Gil M, Wright D.
Fetal Diagn Ther 2014;35:185-92. pdf -
Screening for trisomy 21 in twin pregnancies in the first trimester: an update of the impact of chorionicity on maternal serum markers.
Spencer K, Kagan KO, Nicolaides KH.
Prenat Diagn 2008;28:49-52. -
Screening for trisomy 21 by maternal age, fetal nuchal translucency thickness, free beta-human chorionic gonadotropin and pregnancy-associated plasma protein-A.
Kagan KO, Wright D, Baker A, Sahota D, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;31:618-24. -
First-trimester screening for trisomy 21 by free beta-human chorionic gonadotropin and pregnancy-associated plasma protein-A: impact of maternal and pregnancy characteristics.
Kagan KO, Wright D, Spencer K, Molina FS, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;31:493-50.