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First trimester urine free beta hCG, beta core, and total oestriol in pregnancies affected by Down's syndrome: implications for first-trimester screening with nuchal translucency and serum free beta hCG.
Spencer K, Noble P, Snijders RJ, Nicolaides KH.
Prenat Diagn 1997;17:525-38. -
Early prenatal diagnosis of triploidy.
Jauniaux E, Brown R, Snijders RJ, Noble P, Nicolaides KH.
Am J Obstet Gynecol 1997;176:550-4. -
Maternal serum concentrations of pregnancy associated plasma protein A and pregnancy specific B-1 glycoprotein in multifetal pregnancies before and after fetal reduction.
Abbas A, Sebire NJ, Johnson M, Bersinger N, Nicolaides KH.
Hum Reprod 1996;11,900-2.