-
Screening at 11-13+6 weeks' gestation.
Sonek JD, Nicolaides KH, Janku P.
Ceska Gynekol 2012;77:92-104. -
Temporal effect of Afro-Caribbean race on serum pregnancy-associated plasma protein-a at 9-13 weeks' gestation in screening for aneuploidies.
Ball S, Wright D, Sodre D, Lachmann R, Nicolaides KH.
Fetal Diagn Ther 2012;31:162-9. -
Dose dependency between cigarette consumption and reduced maternal serum PAPP-A levels at 11-13(+6) weeks of gestation.
Kagan KO, Frisova V, Nicolaides KH, Spencer K.
Prenat Diagn 2007;27:849-53.