There is provided an apparatus comprising a control unit and a method of operating the apparatus to determine a health status of an infant. The method comprises acquiring contextual information associated with the infant (302) and acquiring at least one heart rate variability signal from the infant (304). The at least one heart rate variability signal acquired from the infant is processed to determine a heart rate variability feature (306) and the determined heart rate variability feature is assigned to a class according to the acquired contextual information (308). The determined heart rate variability feature is compared to one or more corresponding heart rate variability features stored in the same class as the determined heart rate variability in a memory (310) and a health status of the infant is determined based on the comparison (312).
