For women with regular menstrual periods, the day of ovulation is 14 days before the next menstrual period and 4-5 days before and after the day of ovulation. Usually, the egg can survive in the fallopian tube for 1-2 days after being discharged from the ovary to wait for fertilization; the man’s sperm can maintain fertilization ability in the woman’s reproductive tract for 2-3 days, so it is easier to conceive during the days before and after the egg is discharged. Under normal circumstances, the basal body temperature of women of childbearing age is low during the first half of the menstrual period and even lower during ovulation, but may rise suddenly or slowly by 0.3°C to 0.6°C within 24 hours to a few days after ovulation. Some women may also experience mild pain or vague discomfort in one side of the lower abdomen, while in a smaller number of cases the pain is more pronounced and disappears after 1-2 days. Some women may also experience a small amount of bleeding occasionally during ovulation, some of which is only coffee-colored discharge, most of which stops on its own in 2-3 days and can be observed without treatment. For women with persistent ovulatory bleeding, which occurs during ovulation and usually interferes with conception, it is recommended to visit a hospital for consultation and treatment.