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First trimester maternal serum AFP and total hCG in aneuploidies other than trisomy 21.
Spencer K, Heath V, Flack N, Ong C, Nicolaides KH.
Prenat Diagn 2000;20:635-9. -
Semiquantitative immunohistochemical localisation of PAPP-A and beta-hCG in first trimester chorionic villi from euploid and trisomic pregnancies.
Sebire NJ, Roberts L, Nicolaides KH.
J Pathol 2000;192:30.