Infertility affects approximately 48 million couples globally, with lifestyle factors increasingly recognized as significant contributors to reproductive health. This study explores the impact of dietary habits, physical exercise, and stress management on fertility, aiming to provide a comprehensive understanding of how these factors influence reproductive outcomes. The primary objective is to assess how interventions in these areas can enhance fertility and support individuals and couples facing fertility challenges. Despite advances in medical treatments for infertility, lifestyle factors such as diet, exercise, and stress remain underutilized in managing reproductive health. Many individuals may not be aware of how these factors affect fertility, highlighting a critical need for research-based guidance on integrating lifestyle modifications into fertility treatments. This study is guided by the Biopsychosocial Model of Health. This model posits that health and illness are products of the interplay between biological, psychological, and social factors. Applied to infertility, the framework helps explain how dietary, physical, and psychological factors interact to affect reproductive health. Additionally, the Health Belief Model is utilized to understand how individuals’ perceptions of lifestyle factors influence their adoption of health-promoting behaviors. This research employs a mixed-methods approach, combining quantitative and qualitative data. Quantitative data were gathered through a systematic review of peer-reviewed studies and meta-analyses focusing on the effects of dietary patterns, exercise regimens, and stress management techniques on fertility. Qualitative insights were obtained through interviews and focus groups with healthcare professionals and individuals experiencing infertility. This approach enables a comprehensive analysis of current evidence and practical recommendations. The study finds that dietary factors, such as adequate intake of folate, omega-3 fatty acids, and antioxidants, play a crucial role in enhancing reproductive health. Regular, moderate exercise supports hormonal balance and weight management, which are vital for fertility. Effective stress management techniques, including mindfulness and cognitive behavioral therapy, are essential for reducing the adverse effects of stress on reproductive function. Integrating lifestyle interventions—dietary adjustments, exercise, and stress management—into fertility treatments can significantly improve reproductive outcomes. Recommendations include adopting a nutrient-rich diet, engaging in regular moderate exercise, and utilizing stress reduction strategies.