-
Screening at 11-13+6 weeks' gestation.
Sonek JD, Nicolaides KH, Janku P.
Ceska Gynekol 2012;77:92-104. -
Yolk sac diameter in early pregnancy in maternal diabetes mellitus.
Papaioannou GI, Syngelaki A, Maiz N, Ross JA, Nicolaides KH.
Gynecol Obstet Invest 2012;73:16-20.