Fetal Cardiac Z-Scores

Fetal Echo Z-Scores is a reference calculator for clinicians performing fetal echocardiography. It computes Z-scores and percentiles for two-dimensional and pulsed spectral Doppler measurements of the fetal heart, using published reference equations from multiple author groups. FEATURES - Two calculators in one app — 2-dimensional measurements and pulsed spectral Doppler measurements — sharing a single patient header. - Z-score, percentile and reference-interval plot (5th / 50th / 95th) for each measurement. - Multiple published reference studies per measurement, with an average across contributing authors and a statistical summary of reference-study agreement where three or more studies contribute. - Measurements organised by cardiac structure: atrioventricular and semilunar valves, ventricular length, width and wall thickness, atrial dimensions, great vessels, cardiothoracic ratios, axis and heart rate. - Export results as spreadsheet, image or printable report. - Interface available in 17 languages. - Works entirely offline. No account, no sign-in, no advertising, no tracking. PRIVACY Nothing you type leaves your device. The app has no server component and makes no network requests; anything entered in the patient fields is stored only in the app's private storage and is excluded from cloud backup. INTENDED USE Fetal Echo Z-Scores is a reference and educational tool for qualified healthcare professionals. It is not a medical device and does not diagnose, treat, cure or prevent any medical condition. Results must be interpreted by a qualified clinician within the complete clinical picture and must not be the sole basis for any clinical decision. Reference equations are drawn from the published literature; consult the original publications for the populations, methods and limitations behind each reference set. Created by Greggory R. DeVore, MD.