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. 2020 Nov 2;56(5):694–704. doi: 10.1002/uog.21911

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© 2019 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ 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-21911-FIG-0002-b — Box‐and‐whiskers plots, showing intertwin right (RV) (a) and left (LV) (b) ventricular strain discordance before 20 completed gestational weeks, in 11 monochorionic diamniotic (MCDA) twin pregnancies which later developed twin–twin transfusion syndrome (13 observations) (), compared with 68 that did not (), according to gestational age. Boxes show median and interquartile range (IQR), and whiskers are IQR plus 1.5 × IQR. Circles are outliers.

Inline graphic — Box‐and‐whiskers plots, showing intertwin right (RV) (a) and left (LV) (b) ventricular strain discordance before 20 completed gestational weeks, in 11 monochorionic diamniotic (MCDA) twin pregnancies which later developed twin–twin transfusion syndrome (13 observations) (), compared with 68 that did not (), according to gestational age. Boxes show median and interquartile range (IQR), and whiskers are IQR plus 1.5 × IQR. Circles are outliers.