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Successful induction of labor: prediction by pre-induction cervical length, angle of progression and cervical elastography.
Pereira S, Frick AP, Poon LC, Zamprakou A, Nicolaides KH.
Ultrasound Obstet Gynecol 2014;44:468-75. pdf -
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.