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Posterior brain in fetuses with trisomy 18, trisomy 13 and triploidy at 11 to 13 weeks' gestation.
Ferreira AF, Syngelaki A, Smolin A, Vayna AM, Nicolaides KH.
Prenat Diagn 2012;13:1-5. -
First-trimester markers of aneuploidy in women positive for HIV.
Savvidou M, Samuel I, Syngelaki A, Poulton M, Nicolaides K.
BJOG 2011;118:844-8. -
Placental volume measured by three-dimensional ultrasound at 11 to 13 + 6 weeks of gestation: relation to chromosomal defects.
Wegrzyn P, Faro C, Falcon O, Peralta CF, Nicolaides KH.
Ultrasound Obstet Gynecol 2005;26:28-32.