Basal body temperature should not generally be elevated when ovulation does not occur, and basal body temperature may generally be elevated by 0.3-0.5°C after ovulation. If there is no ovulation, the basal body temperature should not rise. Basal body temperature is a change in body temperature under resting conditions. Clinical monitoring of whether ovulation is occurring can be done by monitoring whether ovulation is occurring or not, which can be determined by the measurement of basal body temperature. If there is an increase in basal body temperature after ovulation. Clinically, it can be suggested that ovulation may occur, but the determination of basal body temperature has certain limitations, there may be some errors, it is recommended to do ovulation test paper monitoring will be more accurate.