Objectives: The aim of this study is to evaluate the impact of a designed educational nutrition program for primipara on neonatal weight. Subject and Methods: The study was carried out at El-Tadamon hospital in Port- Said City This is a private hospital providing outpatient and inpatient obstetric and gynecological services in using a quasi-experimental (pre & post test) design The subjects of the study were any primiparous pregnant woman attending the mentioned study setting during the time of the study was eligible for inclusion in the study sample if she fulfills the following eligibility criteria. Results: The results revealed that there was a significant improvement in the woman knowledge score about nutrition during pregnancy before and after program  . Conclusion: Educational program has a significant and improvement impact on knowledge regarding nutrition during pregnancy, and this is negatively reflected on their dietary practices and habits