Body temperature to measure ovulation is usually measured based on basal body temperature, which is the body temperature of a healthy person when waking up in the early morning, it is usually the lowest body temperature of the day, and basal body temperature to measure ovulation is a clinical method to monitor ovulation. The basal body temperature of women changes periodically with the change of estrogen and progesterone levels. Usually, when a woman has her period, her body temperature will remain at 36.5°C. When ovulation occurs, the body temperature drops slightly, and when ovulation occurs, the body temperature rises slightly and can increase by 0.3-0.5°C. The average body temperature at this time is around 37°C. This body temperature will last until the next menstrual period, which is about 12 days or more. Women who want to master their ovulation period or prepare for pregnancy can clarify their ovulation situation by the change of their own body temperature. The specific operation is as follows: 1. Prepare a thermometer and shake it to below 36℃ every night before going to bed, and put it on the pillow or bedside table; 2. Every morning after waking up, without eating, drinking or talking, place the thermometer under the armpit and take it out after 5 minutes, paying attention to the fact that it should be fixed at the same time every day; 3. If a sudden rise in body temperature of 0.3-0.5℃ is found on a certain day of the menstrual cycle, it is a sign of ovulation, and the basal body temperature is the lowest in the 24 hours before ovulation. In addition to the commonly used mercury thermometer, you can also use an oral thermometer, but remember to clean it after each use. If you are thinking of preparing for pregnancy, you can also monitor follicle development through ovulation test paper method and white belt observation method and prepare for pregnancy based on the results of this monitoring.