IMR Press / CEOG / Volume 35 / Issue 2 / pii/1630638485853-1373001532

Clinical and Experimental Obstetrics & Gynecology (CEOG) is published by IMR Press from Volume 46 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Open Access Original Research
An objective measurement to diagnose micrognathia on prenatal ultrasound
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1 Department of Obstetrics and Gynaecology Antwerp University Hospital UZA, Edegem (Belgium)
Clin. Exp. Obstet. Gynecol. 2008, 35(2), 121–123;
Published: 10 June 2008

Purpose: We introduce the frontal naso-mental angle as an objective measurement for the prenatal detection of fetal retrognathia. The aim of this study is to present normal values for the frontal naso-mental angle from 18 to 35 weeks gestational age. Materials and methods: In 81 patients between gestational ages 18 and 35 weeks the frontal naso-mental angle was measured on a profile view of the foetal face. The values were compared with four cases of proven Pierre Robin syndrome. Results: The frontal nasomental angle is not dependent on gestational age, the mean value is 146.74°, standard deviation 2.7°; 5th percentile 142°, 95th percentile 151°. All four cases of Pierre Robin syndrome demonstrated a significantly lower frontal naso-mental angle below the 5th percentile. Conclusion: The frontal naso-mental angle represents an objective way to diagnose retrognathia.
Pierre Robin syndrome
Prenatal diagnosis
Foetal face
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