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Choroid plexus cyst, intracardiac echogenic focus, hyperechogenic bowel and hydronephrosis in screening for trisomy 21 at 11 + 0 to 13 + 6 weeks.
Dagklis T, Plasencia W, Maiz N, Duarte L, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;31:132-5. -
First-trimester determination of fetal gender by ultrasound.
Efrat Z, Akinfenwa Y, Nicolaides KH.
Ultrasound Obstet Gynecol 1999;13:305-7.