Fetal Echo Z-Scores: Boston Children's Data

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Fetal echo z-score equations from Boston Children's Hospital, published as a part of their sophisticated threshold scoring system, designed to help identify fetuses with a "salvageable" left heart. Z-scores of the mitral valve, left ventricle, right ventricle, aortic valve, and ascending aorta are included.

Based on today's date and the given EGA:
The LMP was ...
The EDD is ...

Site Measured Mean Range Z-Score
Left Heart (cm)
Right Heart (cm)


Predictors of technical success and postnatal biventricular outcome after in utero aortic valvuloplasty for aortic stenosis with evolving hypoplastic left heart syndrome.
McElhinney DB, Marshall AC, Wilkins-Haug LE, Brown DW, Benson CB, Silva V, Marx GR, Mizrahi-Arnaud A, Lock JE, Tworetzky W.
Circulation. 2009 Oct 13;120(15):1482-90. Epub 2009 Sep 28.