Basal body temperature can indirectly reflect the ovarian function of women, the so-called basal body temperature is the body humidity measured after 6-8 hours of rest, before getting up, eating or talking. The basal body temperature of normal reproductive women is slightly lower after menstruation and may be lower on the day of ovulation, but it rises after ovulation due to the production of the corpus luteum by the follicles and falls again until the next period as shown below. Basal body temperature can be measured to understand the presence or absence of corpus luteum and the function of corpus luteum, so as to understand the presence or absence of ovulation and to estimate the date of ovulation. It is very important for the diagnosis and treatment of patients with ovarian dysfunction and infertility, and for the observation of the efficacy. Please follow the instructions and doctor’s orders for the correct implementation of the following: 1. Have a thermometer available in Fahrenheit, and master the method of reading the thermometer to ensure accuracy. 2.Place the thermometer on the small table on the side of the bed, and swing the mercury column down every night before going to bed. 3, every morning after waking up, immediately measure the body temperature in the mouth for 5 minutes. If you can take the temperature at a fixed time every morning (5:00~7:00), it is better. It is strictly prohibited to get up, urinate and defecate, smoke, eat, talk, etc. before taking temperature measurement. 4. If you have sex, it should be indicated in the table. 5.Cases such as cold, alcohol, late sleep, insomnia, etc. often affect the temperature. Should be written in each note, for reference. 6.If there is any transient lower abdominal pain, vaginal bleeding, leucorrhoea, increased sensuality or other abnormalities during the cycle. These should be noted in the notes. 7.The start and stop dates of examination, treatment and medication should be indicated in the remarks. 8. Use a form for each menstrual cycle, starting from the left side of the form, and start with x table of menstrual periods, the form on the previous page can be used for three cycles, if there is no cycle, it should be recorded continuously.