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. 2015 Dec 28;47(2):188–193. doi: 10.1002/uog.15791

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© 2015 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of the International Society of Ultrasound in Obstetrics and Gynecology.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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UOG-15791-FIG-0003-b — Maternal age‐adjusted probability (risk score) for trisomy 18, computed at blood‐draw date, in 437 maternal serum samples that were tested using the IONA® test. , unaffected sample; , trisomy‐18 sample; , cut‐off (1 in 150).

Inline graphic — Maternal age‐adjusted probability (risk score) for trisomy 18, computed at blood‐draw date, in 437 maternal serum samples that were tested using the IONA® test. , unaffected sample; , trisomy‐18 sample; , cut‐off (1 in 150).