Baby Monitor, a mobile interactive voice response system, will bring clinical assessment and referrals directly to mothers and their infants in resource-poor settings who are unlikely to access routine care. To date, mobile applications largely have been used to send patient reminders and health information or to collect patient information through intermediaries such as community health workers. Patients in developing countries have not been end-users of mobile diagnostic tools and medical record systems. If successful, this innovation could save lives, improve health outcomes, and optimize the use of extension workers in rural and remote regions where access to health systems is limited and clinical assessment often occurs too late or not at all. Baby Monitor will help mothers to assess the signs and symptoms of newborn and maternal ill-health in the weeks before and after birth. The system will assess responses to verbal screening questions, provide mothers with health information, and, when necessary, make referrals, alert healthcare providers, and dispatch appropriate healthcare workers.