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Fetal nasal bone length in the second trimester: comparison between population groups from different ethnic origins

  • Panayiota Papasozomenou EMAIL logo , Apostolos P. Athanasiadis , Menelaos Zafrakas , Eleftherios Panteris , Aristoteles Loufopoulos , Efstratios Assimakopoulos and Basil C. Tarlatzis
Published/Copyright: December 15, 2014

Abstract

Objective: To compare normal ranges of ultrasonographically measured fetal nasal bone length in the second trimester between different ethnic groups.

Method: A prospective, non-interventional study in order to establish normal ranges of fetal nasal bone length in the second trimester in a Greek population was conducted in 1220 singleton fetuses between 18 completed weeks and 23 weeks and 6 days of gestation. A literature search followed in order to identify similar studies in different population groups. Fetal nasal bone length mean values and percentiles from different population groups were compared.

Results: Analysis of measurements in the Greek population showed a linear association, i.e., increasing nasal bone length with increasing gestational age from 5.73 mm at 18 weeks to 7.63 mm at 23 weeks. Eleven studies establishing normal ranges of fetal nasal bone length in the second trimester were identified. Comparison of fetal nasal bone length mean values between the 12 population groups showed statistically significant differences (P<0.0001).

Conclusion: Normal ranges of fetal nasal bone length in the second trimester vary significantly between different ethnic groups. Hence, distinct ethnic nomograms of fetal nasal bone length in the second trimester should be used in a given population rather than an international model.


Corresponding author: Panayiota Papasozomenou, Obstetrician Gynecologist, Ethnikis Antistaseos 81, GR-55134, Thessaloniki, Greece, Tel.: +302310-444364, Fax: +302310222498, E-mail:

Acknowledgments

The authors would like to thank E. Vogiatzopoulou for assistance in data collection, Dr. A. Karavida, Dr. M. Papastergiou, and Dr. A. Zavlanos for routine second trimester nasal bone measurements and I. Dimitrakopoulos (GE Healthcare) for technical consultation.

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The authors stated that there are no conflicts of interest regarding the publication of this article.

Received: 2014-9-3
Accepted: 2014-11-10
Published Online: 2014-12-15
Published in Print: 2016-3-1

©2016 by De Gruyter

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