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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. -
Femur and humerus length in trisomy 21 fetuses at 11-14 weeks of gestation.
Longo D, DeFigueiredo D, Cicero S, Sacchini C, Nicolaides KH.
Ultrasound Obstet Gynecol 2004;23:143-7.