This master s thesis proposes an in-depth investigation into the impact of using physical models of fetal hearts, both healthy and with congenital heart defects, on the understanding of complex diagnoses in fetal development and potential heart conditions, especially during the prenatal period. Considering the importance of the mother-fetus relationship for the emotional well-being of both, the study aims to understand how these three-dimensional representations and models of fetal hearts can significantly contribute, as supportive material, to alleviating doubts regarding anomalies, childbirth, and the postpartum period, aiming for differentiated clinical practices in prenatal programs, enhancing physician-patient relationship and communication. In this context, the role of design in shaping these representations is emphasized, as meticulous selection of visual elements can maximize the effectiveness of images and models. The research seeks to enhance the overall experience of pregnant women during gestation. The proposed Partnership Design methodology adopted throughout the research is based on close collaboration with specialists in obstetrics, cardiology, psychology, and related fields, ensuring approaches aligned with best practices in healthcare and enriching the interpretation of results through specialized knowledge. This multidisciplinary and interdisciplinary approach strengthens the validity and relevance of the study, providing a comprehensive and grounded insight into the effective understanding and promotion of medical-patient and maternal-fetal bonding in various contexts. Throughout the monitoring of pregnant women, 3D physical models of both healthy and congenitally diseased fetal hearts were printed and provided as supportive material to clarify fetal cardiac health conditions to pregnant women, offering emotional support and family education. The models provided a visual and tactile experience, allowing pregnant women to have a tangible understanding of the fetal heart conditions. The use of these printed models aimed to enhance understanding and engagement in the process, enabling a deeper connection with fetal development and cardiac health, and facilitating subsequent decision-making involving necessary medical procedures. Questionnaires were administered to study participants to gather sociodemographic and gestational history data, as well as perceptions following exposure to the 3D physical models, which may indicate future developments for the research.