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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. -
Evidence-based obstetric ethics and informed decision-making by pregnant women about invasive diagnosis after first-trimester assessment of risk for trisomy 21.
Nicolaides KH, Chervenak FA, McCullough LB, Avgidou K, Papageorghiou A.
Am J Obstet Gynecol 2005;193:322-6.