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Liver volume in trisomy 21 and euploid fetuses at 11 to 13 weeks.
Gielchinsky Y, Zvanca M, Minekawa R, Persico N, Nicolaides KH.
Prenat Diagn 2011;31:28-32. -
Maxillary length at 11-14 weeks of gestation in fetuses with trisomy 21.
Cicero S, Curcio P, Rembouskos G, Sonek J, Nicolaides KH.
Ultrasound Obstet Gynecol 2004;24:19-22.