The basal body temperature of normal women of childbearing age is the same as that of the menstrual cycle. The corpus luteum formed after ovulation and the secretion of progesterone stimulate the hypothermia’s thermoregulatory center, leading to an increase in basal body temperature and continuing until the next menstrual cramps. Using a thermometer to measure ovulation is a simple and effective method. This can effectively increase the chance of conception. Then, how does the thermometer test the ovulation period? How accurate is it? How to measure ovulation with a thermometer? How to measure ovulation with a thermometer? Recording the basal body temperature measured every day on a body temperature record sheet and connecting them into a curve, it can be seen that the body temperature in the first half of the menstrual period is low, and the body temperature rises in the second half of the menstrual period. The phase-type body temperature curve indicates that the ovary has ovulation, and ovulation generally occurs before the rise in body temperature or from low to high. Under normal conditions, women have lower basal body temperatures before ovulation and rise after ovulation. This is because the corpus luteum formed after ovulation and the secretion of progesterone stimulate the hypothermia’s thermoregulatory center, leading to an increase in basal body temperature and continuing until the next menstrual cramps. This change is repeated for the basal body temperature of the next menstrual cycle. Is the body temperature meter ovulation accurate? Is it accurate to measure ovulation? In most cases, the basal body temperature measurement method is very reliable for judging the safety period after ovulation, but sometimes it is also encountered when the body temperature curve is irregular. At this time, the thermometer cannot be used to measure ovulation. Combined with a variety of methods for measuring ovulation, it can effectively infer the date of ovulation, such as early pregnancy test paper test, cervical mucus observation method, B-ultrasound monitoring method and so on. The basal body temperature measurement can only indicate that ovulation has occurred, but it cannot predict when ovulation occurs. Therefore, it can only determine the safety period after ovulation and cannot determine the safety period before ovulation. If you can cooperate with the calendar method and cervical mucus observation method, you can solve this problem. In most cases, the basal body temperature measurement method is very reliable for judging the safety period after ovulation, but sometimes the body temperature curve is irregular, so the exact time of ovulation cannot be determined. In this case, the safe period contraception cannot be used. In order to improve the correctness of the measured basal body temperature, the mercury column on the thermometer should be lowered to below 35 °C before going to sleep every night, and placed on the bedside table or on the side of the pillow so that it can be used at will, minimizing the activity. If you get up to take the thermometer, it will raise the basal body temperature, making the temperature value of this day meaningless. For women who are working in the middle or night shift, put the time to measure the basal body temperature at the beginning of each sleep 6-8 hours.