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Meta-analysis of second-trimester markers for trisomy 21.
Agathokleous M, Chaveeva P, Poon LC, Kosinski P, Nicolaides KH.
Ultrasound Obstet Gynecol 2013;41:247-61. -
Additional first-trimester ultrasound markers.
Sonek J, Nicolaides K.
Clin Lab Med 2010;30:573-92. -
Nasal bone length in euploid fetuses at 16-24 weeks of gestation by three-dimensional ultrasound.
Persico N, Molina F, Borenstein M, Azumendi G, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;36:285-90.