The cyclotest lady basal thermometer has been specifically designed for use with the NFP method. To use it, measure your waking temperature daily right after you wake up and before getting out of bed. By measuring your temperature, you can determine the fertile and infertile days in your cycle. The cyclotest lady is your assistant for natural cycle control or targeted family planning. The jumbo display of the cyclotest lady features a four-digit readout with two decimal places. The flexible measuring tip is ideal for oral, vaginal, or rectal measurement. The last measurement value is stored. The cyclotest lady basal thermometer is a particularly sensitive thermometer and utilizes modern temperature measurement technology. It offers high measurement accuracy, as the temperature is measured more precisely than with conventional fever thermometers.