1, measurement of basal body temperature before the preparation ① Prepare a thermometer, master the reading method, to ensure accuracy. It is recommended to use a special basal thermometer, which is different from the general thermometer and has a higher accuracy. ② Prepare a basal body temperature record sheet, master the recording method, develop a habit, record carefully and make various marks. ③Ensure more than 6 hours of adequate sleep. 2, the method of measuring the basal body temperature ① every night before going to bed, the mercury column of the thermometer will be thrown to below 35 degrees, placed in the place within reach after waking up. ②Every morning after waking up, immediately put the thermometer under the tongue and take out the reading after 5 minutes, you can also measure it under the armpit, but since the temperature under the armpit is not as stable as the oral temperature, it is recommended to measure the oral temperature. After measurement, record the result on the basal body temperature record sheet. ③It is strictly forbidden to get up, walk around, urinate and defecate, eat and talk before measuring body temperature. ④In case of cold, fever, diarrhea, insomnia, drinking alcohol, using electric blanket, drinking alcohol excessively, taking medication, sleeping late, waking up late, etc., it is often easy to affect the basal body temperature, so pay attention to it when measuring, and pay attention to it with special marking instructions. ⑤ The day of menstruation and intercourse must be marked with additional marks. (6) The horizontal axis of the basal body temperature record table indicates the date and menstrual cycle, with each small cell being one day. Start recording from the left side of the table on the first day of the menstrual cycle, and draw the number of temperatures measured each day with dots in the corresponding grid of the temperature record sheet until one day before the next menstrual period, and finally connect the dots with a straight line in order.