A system for monitoring the physiological conditions of a plurality of infants in a neonatal intensive care unit (NICU). The system includes a plurality of microenvironments, a plurality of environmental sensors to detect a first environmental condition in the microenvironments, and a plurality of external environmental sensors to detect a second environmental condition in the NICU. The system also includes a central processor that compares signals from the environmental sensors to signals from the external environmental sensors and determines a correlation between the first environmental condition and the second environmental condition. A method of monitoring the conditions of a plurality of infants is also disclosed.