This systematic review examines the multifaceted nature of male involvement in maternal health and highlights the lack of a universal definition, which complicates the interpretation of existing literature. Analyzing 282 studies from various regions, the review identifies two primary aspects of male involvement: psychosocial support and instrumental support for maternal health care utilization. The findings reveal significant regional differences, with African studies focusing on HIV prevention, North American and European studies on psychosocial health, and Asian studies on nutrition. The review also notes that most studies rely on a narrow set of indicators, such as antenatal care attendance and financial support, often neglecting aspects like communication and shared decision-making. The authors advocate for a broader, holistic approach to male involvement programs to enhance their potential impact and promote gender-transformative practices.