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Screening for trisomy at 11-13 weeks' gestation: use of pregnancy-associated plasma protein-A, placental growth factor or both.
Mazer Zumaeta A, Wright A, Syngelaki A, Maritsa VA, Bardani E, Nicolaides KH.
Ultrasound Obstet Gynecol 2020;56:408-415. pdf -
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 trisomy 21 by biomarkers and maternal blood cell-free DNA testing.
Nicolaides KH, Wright D, Poon LC, Syngelaki A, Gil MM.
Ultrasound Obstet Gynecol 2013;42:41-50. pdf -
Some thoughts on the true value of ultrasound.
Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:671-4. -
Maternal serum hCG and fetal nuchal translucency thickness for the prediction of fetal trisomies in the first trimester of pregnancy.
Brizot ML, Snijders RJ, Butler J, Bersinger NA, Nicolaides KH.
Br J Obstet Gynaecol 1995;102:127-32.