The method of measuring body temperature during ovulation is as follows: 1) Start monitoring on the first day of menstruation. 2) On the first night, put the thermometer below 35℃ and place it at the head of the bed. 3) When you wake up in the morning, you can’t talk or move around, so put the thermometer under your armpit and measure the temperature for 5 minutes. 4) Take out the thermometer and put the readings on a piece of paper, and label it with the date. 5) If you have had sex, if you have had sex on February 1, mark it on the paper. 6) Measure the basal body temperature until the first day of the next menstrual period, which is one month. If you had sex on February 1, mark the date on the paper. 6. Measure your basal body temperature until the first day of your next period, which is one month. Basal body temperature is mainly viewed as a low temperature in the first half of menstruation, if the temperature rises by 0.3~0.5℃ in the second half of menstruation, usually around 37, and the high temperature lasts for more than 12 days, then it indicates that there is ovulation. The day before the basal body temperature rises almost to the lowest state, this day is the time of ovulation.