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Metopic suture in fetuses with trisomy 21 at 11 + 0 to 13 + 6 weeks of gestation.
Faro C, Wegrzyn P, Benoit B, Chaoui R, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;27:286-9. -
Screening for trisomy 21 by fetal tricuspid regurgitation, nuchal translucency and maternal serum free beta-hCG and PAPP-A at 11 + 0 to 13 + 6 weeks.
Falcon O, Auer M, Gerovassili A, Spencer K, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;27:151-5.