Reference Ranges and Development Patterns of Fetal Myocardial Function using Speckle Tracking Echocardiography in Healthy Fetuses at 17-24 Weeks of Gestation.

Our study created z-score and corresponding centile calculators, 5th and 95th centile reference tables, and corresponding graphs and determined the normal evolution across gestation using multiple somatic growth and age variables between 17 and 24 gestational weeks. These nomograms serve as an essential prerequisite for quantitative evaluating fetal cardiac contractility and allow for precisely detecting early changes of the fetal heart function.