The great aunt is mostly referred to as menstruation, body temperature drops to 36.5 ℃, not necessarily menstruation is coming, but also may be due to physical lesions. Under normal circumstances, a woman’s basal body temperature is bi-directional, and the changes in body temperature are mainly related to the changes in progesterone levels more closely, usually in menstruation when a woman’s corpus luteum atrophies, progesterone levels drop, so there will be a drop in body temperature phenomenon. In addition, a drop in body temperature may also be due to hypothyroidism, massive blood loss and other physical pathologies that lead to a decrease in body temperature. To summarize, you can’t judge whether you are going to have your period simply based on the fact that your body temperature has dropped to 36.5℃. If you want to determine whether you are menstruating when your body temperature drops, it is recommended that you go to the gynecology department of the hospital and make a comprehensive judgment by combining the relevant items with the doctor’s examination after the interview.