Temperature detection of ovulation is also known as basal body temperature measurement to understand the time of ovulation, the method includes measuring body temperature, recording body temperature, analyzing the time of ovulation. 1. Measurement of body temperature: the night before the test put the thermometer on the pillow, every day to fix the time in the morning when you just wake up, during the period can not exercise, can not eat, due to the tongue will not be subject to the interference of the temperature of the external environment, the thermometer should be placed under the tongue to measure for five minutes and then observe the results. 2. Record temperature: Record the measured temperature in this book, it is recommended to measure for two consecutive months, more regular to find out the time of ovulation. If you have a cold or fever during the period of basal body temperature measurement, it will easily affect the change of body temperature, and you should mark it well. 3. Analyze the time of ovulation: the body temperature before ovulation is generally low, after ovulation, the body luteinizing hormone secretion increases, stimulating the thermoregulatory center will lead to a rise in body temperature of 0.3 ~ 0.5 ℃ until the next menstrual period, presenting a biphasic body temperature, generally indicates that the ovary has ovulated. Measuring body temperature to detect ovulation through a thermometer may have errors in the results and is not 100% accurate.