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First-trimester combined screening for trisomy 21 at 8-13 weeks.
Wright D, Spencer K, Kagan K, Tørring N, Petersen O, Christou A, Kallikas J, Nicolaides K.
Ultrasound Obstet Gynecol 2010;36:404-11. -
Chorionic villus sampling at 11 to 13 weeks of gestation and hypertensive disorders in pregnancy.
Khalil A, Akolekar R, Pandya P, Syngelaki A, Nicolaides K.
Obstet Gynecol 2010;116:374-80. -
Two-stage first-trimester screening for trisomy 21 by ultrasound assessment and biochemical testing.
Kagan K, Staboulidou I, Cruz JJ, Wright D, Nicolaides K.
Ultrasound Obstet Gynecol 2010;36:542-7. -
First-trimester ultrasound and biochemical markers of aneuploidy and the prediction of impending fetal death.
Spencer K, Cowans NJ, Avgidou K, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;28:637-43. -
Screening for trisomy 21 by fetal tricuspid regurgitation, nuchal translucency and maternal serum free beta-hCG and PAPP-A at 11 + 0 to 13 + 6 weeks.
Falcon O, Auer M, Gerovassili A, Spencer K, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;27:151-5.