Detecting pregnancy but the body temperature does not rise may be insufficient luteal function, detection error and other reasons. 1. Luteal insufficiency: when a woman is pregnant, the corpus luteum will secrete a lot of luteinizing hormone, and luteinizing hormone will stimulate the body temperature center, so that the basal body temperature appears to be elevated, if the luteal insufficiency will be detected pregnancy, but the phenomenon of the body temperature did not rise. 2. Detection error: If the woman in the detection of pregnancy with a pregnancy test or pregnancy test paper, there has been an expiration date of the situation or improper way, there may be detection errors, resulting in the detection of pregnancy but the body temperature did not rise. It is recommended to go to the hospital in time to find out if you are pregnant, and then complete the relevant examinations and follow the doctor’s instructions.