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Serum pregnancy-associated plasma protein-A in the three trimesters of pregnancy: effects of maternal characteristics and medical history.
Wright D, Silva M, Papadopoulos S, Wright A, Nicolaides KH.
Ultrasound Obstet Gynecol 2015;46:42-50. pdf -
Serum free b-human chorionic gonadotropin in the three trimesters of pregnancy: effects of maternal characteristics and medical history.
Wright D, Papadopoulos S, Silva M, Wright A, Nicolaides KH.
Ultrasound Obstet Gynecol 2015;46:51-9. pdf -
Maternal serum screening marker levels in women with a previous aneuploidy pregnancy.
Spencer K, Staboulidou I, Cruz JJ, Karagiannis G, Nicolaides KH.
Prenat Diagn 2009;29:1242-3.