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Sonographic screening for trisomy 13 at 11 to 13(+6) weeks of gestation.
Papageorghiou AT, Avgidou K, Spencer K, Nix B, Nicolaides KH.
Am J Obstet Gynecol 2006;194:397-401. -
Fetal middle cerebral artery peak systolic velocity in the investigation of non-immune hydrops.
Hernandez-Andrade E, Scheier M, Dezerega V, Carmo A, Nicolaides KH.
Ultrasound Obstet Gynecol 2004;23:442-5.