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Brachycephaly and frontal lobe hypoplasia in fetuses with trisomy 21 at 11 + 0 to 13 + 6 weeks.
Borenstein M, Dagklis T, Csapo B, Sotiriadis A, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;28:870-5. -
Ear length in trisomy 21 fetuses at 11-14 weeks of gestation.
Sacchini C, El-Sheikhah A, Cicero S, Rembouskos G, Nicolaides KH.
Ultrasound Obstet Gynecol 2003;22:460-3.