The Bill & Melinda Gates Foundation's Maternal, Newborn, and Child Health program works to expand coverage of proven, cost-effective interventions to reduce maternal and child mortality. The foundation invests in improving tools, technologies, and treatments; health care practices; and advocating for policies that benefit maternal, newborn, and child survival. Key strategies include adapting existing interventions, developing new low-cost tools, improving primary health care, disseminating best practices, and strengthening local advocacy.