The study of heart mechanics is necessary to understand and quantify the hetitlehy vs. unhetitlehy cardiac characteristics. Understanding proper cardiac mechanics will shed light on critical properties such as flow field, stress distribution, and their effects of cardiac development and function. The main purpose of this project is investigating the cardiac Fluid-Structure Interaction as a numerical study. New imaging techniques have been used to collect high resolution, 3D geometric data of developing hearts. Boundaries of the surface and chambers were identified from these images, smoothed, and imported into a CAD/CAM software for reconstruction using automated in-house programs. Finally the volumized heart has been modeled for fluid-structure interaction analysis using Finite Element methods.