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Screening for trisomy 21 in monochorionic twins by measurement of fetal nuchal translucency thickness.
Vandecruys H, Faiola S, Auer M, Sebire N, Nicolaides KH.
Ultrasound Obstet Gynecol 2005;25:551-3. -
Screening for trisomy 21 in twins using first trimester ultrasound and maternal serum biochemistry in a one-stop clinic: a review of three years experience.
Spencer K, Nicolaides KH.
BJOG 2003;110:276-80. -
First trimester prenatal diagnosis of trisomy 21 in discordant twins using fetal nuchal translucency thickness and maternal serum free beta-hCG and PAPP-A.
Spencer K, Nicolaides KH.
Prenat Diagn 2000;20:683-4. -
Screening for trisomy 21 in twin pregnancies by maternal age and fetal nuchal translucency thickness at 10-14 weeks of gestation.
Sebire NJ, Snijders RJM, Hughes K, Sepulveda W, Nicolaides KH.
BJOG 1996;103:999-1003.