1.Usage: fill in the corresponding position in the attached EXCEL table, fill in the basal body temperature (BBT) measured every day, and automatically generate the curve. 2.Requirement: After waking up in the morning without turning over or talking, place the oral thermometer under the tongue, measure and record the basal body temperature (BBT). 3.Significance: The lowest point of the basal body temperature (BBT) curve is the day of ovulation, arrange intercourse on the same day. 4.Note: In case of cold, fever, diarrhea, insomnia, alcohol consumption, use of electric blanket, etc., it is often easy to affect the basal body temperature, so pay attention to it when measuring, and pay attention to it with special marking instructions. First, what is the basal body temperature, also known as the resting temperature, is the temperature measured after 6-8 hours of sleep, such as in the morning after waking up from a deep sleep, the body temperature has not been affected by exercise diet or emotional changes. The body temperature is extremely sensitive to progesterone (also known as luteinizing hormone), and a certain amount of progesterone (12.8nmol/L) can cause the body temperature to rise. On the day following ovulation, the formation of progesterone by the ovaries will cause the body temperature to rise by about 0.6 degrees Celsius, resulting in a biphasic change in body temperature. The high temperature period lasts about 12-16 days (average 14 days). If there is no pregnancy, the corpus luteum atrophies and stops producing progesterone, the body temperature drops and returns to the basic line, and menstruation occurs. If pregnant, the body temperature continues to be high because the corpus luteum is supported by the placental secretion (chorionic) gonadotropin and continues to secrete progesterone. If the ovaries are malfunctioning, there is no ovulation and no corpus luteum formation, so the body temperature will continue to be low. The length of the menstrual cycle varies from person to person, ranging from 21 to 35 days, with an average of about 28 days, separated by the day of ovulation, the follicular phase before ovulation and the luteal phase after ovulation. The length of the follicular phase is not certain, but the normal luteal phase is fixed at about 14 days on the next two days. Common changes in basal body temperature 1. Ovulation: When a woman is menstruating, the basal body temperature is low; after ovulation, the basal body temperature will turn to high. Generally speaking, the fertilization rate of women becomes lower 24 hours after ovulation; however, male sperm can survive in women’s uterus for about 72 hours. Therefore, you should have intercourse when the woman’s basal body temperature is at a low temperature and close to ovulation, you can have intercourse every two days to increase the chances of fertilization; if you wait until the basal body temperature reaches a high temperature and then have intercourse, the chances of pregnancy will have been reduced. 2, polycystic ovaries: these patients are “fat” as a symptom, often easily fat, acne, hairy, menstruation is often not allowed. The performance in the basal body temperature is: high temperature period is short, serious may also be regular low temperature. Women with this condition usually have familial genetic diabetes, and if they are pregnant with a child, they belong to a high risk group for gestational diabetes. 3, poor ovarian function: people with poor ovarian function, usually the cycle of basal body temperature will be shortened, the original 28 days, may slowly become 24 days or 22 days, the high temperature period is also shortened accordingly. 4, high lactogen: high lactogen, the high temperature period of the basal body temperature will be shortened, and the quality of their eggs will be poorer, so it is not easy to get pregnant or easy to miscarry. 5.Dangerous period (easy to conceive period): The high temperature period of basal body temperature belongs to the safe period (not easy to conceive period), and the low temperature period belongs to the dangerous period, but there are individual differences in the low temperature period. For example, for young girls, who have good ovarian function and more secretions, the danger period will be correspondingly longer and the chance of sperm survival in the uterus will be relatively high. Therefore, it is likely that the risk period must be seen as starting 5 days before ovulation.