A method and system for monitoring the condition of livestock comprises a plurality of sensors (115, 103, 113, 111 , 107, 105) for sensing a plurality of different behavioural parameters of an animal. The sensed data is transmitted by a unit (115), wirelessly, t a central processor (119) and a plurality of status conditions of the animal is determined on the basis of the transmitted, sensed data such as the onset of parturition, fertility status and other health status conditions. The unit (115) may be permanently worn by the animal and may keep an electronic record of the status conditions of the animal.