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Body Mass Index at 11-13 Weeks' Gestation and Pregnancy Complications.
Syngelaki A, Bredaki FE, Vaikousi E, Maiz N, Nicolaides KH.
Fetal Diagn Ther 2011;30:250-65. -
Maternal serum progesterone-induced blocking factor at 11-13 weeks gestation in spontaneous early preterm delivery.
Beta J, Szekeres-Bartho J, Skyfta E, Akolekar R, Nicolaides KH.
Fetal Diagn Ther 2011;29:197-200.