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A screening program for trisomy 21 at 10-14 weeks using fetal nuchal translucency, maternal serum free beta-human chorionic gonadotropin and pregnancy-associated plasma protein-A.
Spencer K, Souter V, Tul N, Snijders R, Nicolaides KH.
Ultrasound Obstet Gynecol 1999;13:231-7. -
Early prenatal diagnosis of triploidy.
Jauniaux E, Brown R, Snijders RJ, Noble P, Nicolaides KH.
Am J Obstet Gynecol 1997;176:550-4. -
Screening for fetal trisomy 21 in the first trimester of pregnancy: maternal serum free beta-hCG and fetal nuchal translucency thickness.
Noble PL, Abraha HD, Snijders RJ, Sherwood R, Nicolaides KH.
Ultrasound Obstet Gynecol 1995;6:390-5. -
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.