The body temperature is higher on the fifth day of ovulation, which may be due to the formation of the corpus luteum, or it may be a manifestation of pregnancy. 1. Luteinization: After a woman ovulates, she will form a corpus luteum, which will secrete excess progesterone during the luteinization period, and when it repeatedly stimulates the central thermoregulatory system of the hypothalamus, the body temperature will rise, which is a normal physiological reaction and generally does not require special treatment. 2. Pregnancy: If the basal body temperature continues to increase for up to 20 days or so, the possibility of pregnancy is relatively large. Because of the influence of progesterone during pregnancy, the central nervous system is too excited, which will lead to a continuous rise in body temperature, which is also a normal performance. On the 5th day of ovulation, the body temperature is higher, it is recommended to observe regularly and use the test paper to determine whether you are pregnant or not. Under normal circumstances, the basal body temperature will rise to 0.3-0.4 degrees of the original body temperature, if it exceeds 37.2 degrees, it is considered abnormal, and you need to consult a doctor in time to analyze the cause and then treat the symptoms.