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Frontomaxillary facial angle in trisomy 21 fetuses at 16-24 weeks of gestation.
Molina F, Persico N, Borenstein M, Sonek J, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;31:384-7. -
Frontomaxillary facial angle in screening for trisomy 21 at 11 + 0 to 13 + 6 weeks.
Borenstein M, Persico N, Kagan KO, Gazzoni A, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;32:5-11.