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Early vaginal bleeding has no impact on markers used in first trimester aneuploidy screening.
Spencer K, Spencer CE, Stamatopoulou A, Staboulidou I, Nicolaides KH.
Prenat Diagn 2010;30:547-50. -
First trimester aneuploidy screening in the presence of a vanishing twin: implications for maternal serum markers.
Spencer K, Staboulidou I, Nicolaides KH.
Prenat Diagn 2010;30:235-40. -
Effect of temperature on the measurement of free beta-hCG and PAPP-A concentration.
Cruz JJ, Cruz G, Minekawa R, Maiz N, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;36:141-6. -
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.