An analyte monitoring system, comprising: an analyte sensor for transcutaneous positioning under a skin layer of a subject; a blood glucose meter; a continuous glucose data logger operatively coupled to the analyte sensor and configured for signal communication with the blood glucose meter, the continuous glucose data logger comprising: a control unit; a memory operatively coupled to the control unit, configured to store a plurality of data associated with the monitored analyte level received from the sensor; and a communication unit operatively coupled to the control unit; wherein when the continuous glucose data logger detects a communication link with the blood glucose meter, the continuous glucose data logger is further configured to retrieve the stored plurality of data from the memory and to transmit the retrieved data to the blood glucose meter; characterized in that the continuous glucose data logger is configured to operate in three transmission modes, wherein: in a first transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter when new data is available; in a second transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter when new data is available, and to receive an acknowledgement when the retrieved data is successfully received by the blood glucose meter, or to store the retrieved data if the transmission is unsuccessful; and in a third transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter only upon receipt of a request from the blood glucose meter. an analyte sensor for transcutaneous positioning under a skin layer of a subject; a blood glucose meter; a continuous glucose data logger operatively coupled to the analyte sensor and configured for signal communication with the blood glucose meter, the continuous glucose data logger comprising: a control unit; a memory operatively coupled to the control unit, configured to store a plurality of data associated with the monitored analyte level received from the sensor; and a communication unit operatively coupled to the control unit; a control unit; a memory operatively coupled to the control unit, configured to store a plurality of data associated with the monitored analyte level received from the sensor; and a communication unit operatively coupled to the control unit; wherein when the continuous glucose data logger detects a communication link with the blood glucose meter, the continuous glucose data logger is further configured to retrieve the stored plurality of data from the memory and to transmit the retrieved data to the blood glucose meter; characterized in that the continuous glucose data logger is configured to operate in three transmission modes, wherein: in a first transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter when new data is available; in a second transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter when new data is available, and to receive an acknowledgement when the retrieved data is successfully received by the blood glucose meter, or to store the retrieved data if the transmission is unsuccessful; and in a third transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter only upon receipt of a request from the blood glucose meter. in a first transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter when new data is available; in a second transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter when new data is available, and to receive an acknowledgement when the retrieved data is successfully received by the blood glucose meter, or to store the retrieved data if the transmission is unsuccessful; and in a third transmission mode the continuous glucose data logger is configured to transmit the retrieved data to the blood glucose meter only upon receipt of a request from the blood glucose meter.