A monitoring system for a neonate, comprising a readout module, an optical physiological sensor and a receiving station, wherein: the optical physiological sensor comprises: a flexible circuit board, a light emitter and a light detector; the flexible circuit board having: a sensor portion to which the light emitter and light detector are connected; a module portion including contacts for electrically connecting the light emitter and light detector to the readout module; and an elongate lead portion between the sensor portion and module portion; and the readout module comprising: an electrical power store for powering the readout module; an electronic circuit for providing a drive signal to the light emitter of the physiological sensor and for receiving the signal from the light detector of the physiological sensor; a processor for processing the signal from the light detector to produce data; a wireless transmitter, configured to wirelessly transmit the data from the readout module to a receiving station; the receiving station comprising: an indicator operable to provide a periodic visual indication every 6 seconds; a display; and a docking portion for receiving the readout module, wherein: the receiving station is configured to wirelessly receive data from the readout module, and to display an indication of at least one physiological parameter of the neonate on the display; and the docking portion comprises charging contacts by which the receiving station is operable to charge the readout module the at least one physiological parameter comprises heart rate. the optical physiological sensor comprises: a flexible circuit board, a light emitter and a light detector; the flexible circuit board having: a sensor portion to which the light emitter and light detector are connected; a module portion including contacts for electrically connecting the light emitter and light detector to the readout module; and an elongate lead portion between the sensor portion and module portion; and a sensor portion to which the light emitter and light detector are connected; a module portion including contacts for electrically connecting the light emitter and light detector to the readout module; and an elongate lead portion between the sensor portion and module portion; and the readout module comprising: an electrical power store for powering the readout module; an electronic circuit for providing a drive signal to the light emitter of the physiological sensor and for receiving the signal from the light detector of the physiological sensor; a processor for processing the signal from the light detector to produce data; a wireless transmitter, configured to wirelessly transmit the data from the readout module to a receiving station; an electrical power store for powering the readout module; an electronic circuit for providing a drive signal to the light emitter of the physiological sensor and for receiving the signal from the light detector of the physiological sensor; a processor for processing the signal from the light detector to produce data; a wireless transmitter, configured to wirelessly transmit the data from the readout module to a receiving station; the receiving station comprising: an indicator operable to provide a periodic visual indication every 6 seconds; a display; and a docking portion for receiving the readout module, wherein: the receiving station is configured to wirelessly receive data from the readout module, and to display an indication of at least one physiological parameter of the neonate on the display; and the docking portion comprises charging contacts by which the receiving station is operable to charge the readout module the at least one physiological parameter comprises heart rate. the receiving station is configured to wirelessly receive data from the readout module, and to display an indication of at least one physiological parameter of the neonate on the display; and the docking portion comprises charging contacts by which the receiving station is operable to charge the readout module the at least one physiological parameter comprises heart rate.