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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. -
Total amount of circulating human chorionic gonadotrophin alpha and beta subunits in first trimester trisomies 21 and 18.
Jauniaux E, Nicolaides KH, Nagy AM, Brizot M, Meuris S.
J Endocrinol 1996;148:27-31. -
Gene expression of human pregnancy-associated plasma protein-A in placenta from trisomic pregnancies.
Brizot ML, Hyett JA, Mckie AT, Bersinger NA, Farzaneh F, Nicolaides KH.
Placenta 1996;17:33-6.