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First trimester markers of trisomy 21 and the influence of maternal cigarette smoking status.
Spencer K, Ong CYT, Liao AWJ, Papademetriou D, Nicolaides KH.
Prenat Diagn 2000;20:852-3. -
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. -
The influence of fetal sex in screening for trisomy 21 by fetal nuchal translucency, maternal serum free beta-hCG and PAPP-A at 10-14 weeks of gestation.
Spencer K, Ong CY, Liao AW, Papademetriou D, Nicolaides KH.
Prenat Diagn 2000;20:673-5. -
Screening for triploidy by fetal nuchal translucency and maternal serum free beta-hCG and PAPP-A at 10-14 weeks of gestation.
Spencer K, Liao AW, Skentou H, Cicero S, Nicolaides KH.
Prenat Diagn 2000;20:495-9. -
Early prenatal diagnosis of triploidy.
Jauniaux E, Brown R, Snijders RJ, Noble P, Nicolaides KH.
Am J Obstet Gynecol 1997;176:550-4.