The fact that the basal body temperature continues to be high but you are not pregnant may be due to inaccurate temperature measurement, longer survival time of the corpus luteum and other reasons. 1. Inaccurate measurement of body temperature: As the requirements for checking the basal body temperature are very high, women are required to have a deep sleep for six hours, within which they can’t get up at night, and they can’t talk or turn over after waking up in the morning to measure the body temperature directly. If there is a night, emotional irritability, etc., these factors will affect the woman’s body temperature, resulting in inaccurate temperature measurement. 2. Luteal survival time is long: If the female luteal survival time is long, the body progesterone is at a high level for a long time, the female will appear basal body temperature is in the high temperature phase for a long time, but there is no pregnancy. If a woman’s basal body temperature is persistently high and accompanied by delayed menstruation, it is recommended that she consult a doctor in a timely manner, and under the guidance of the doctor, complete the relevant examinations to clarify the cause of the disease and treat the symptoms.