Basal body temperature measurement is the most cost-free and instructive test for infertility patients, so it is important to master its measurement method carefully. 1. Get a thermometer, master the reading method and make sure it is accurate. The general mercury thermometer can be. 2.Every night before going to bed, the mercury column of the thermometer will be dumped to 35 degrees below, if the electronic thermometer will become the initial value, placed in a place within reach after waking up. 3.Every morning after waking up, immediately put the thermometer under the tongue for 5 minutes and then take out the reading and record it on the special form. Do not measure in the armpit, because the armpit temperature is not stable. 4.It is strictly forbidden to get up, urinate, defecate, eat and talk before measuring the temperature. 5, should record the presence of many factors that affect the basal body temperature, such as: colds, insomnia, alcohol consumption, medication, emotions, etc.. In case of cold, fever, diarrhea, insomnia, alcohol consumption, use of electric blankets, excessive alcohol consumption, late sleeping and late waking, etc., it is often easy to affect the basal body temperature, which should be noted when measuring, while paying attention to the special marker instructions. 6.The day of menstruation and intercourse must be marked with additional marks. 7, the measurement results recorded on the basal body temperature table, in addition to recording on paper, can also be recorded in the special basal body temperature management tool, can be more convenient, intuitive view of the basal body temperature curve, at a glance to see the low temperature period and high temperature period.