1.What is basal body temperature? The body temperature measured after a long period of sleep (6 hours) and before any activity is carried out is called Basal Body
Temperature (BBT), also known as resting body temperature. For example, it is taken in the morning when the body temperature is not affected by exercise, diet or emotional changes after waking up from a deep sleep. The basal body temperature is usually the lowest body temperature of the body during the day and night. 2.How can ovulation and ovarian function be seen by basal body temperature? The thermoregulatory center is extremely sensitive to the action of progesterone (also known as luteinizing hormone), and a certain amount of progesterone (12.8nmol/L) can cause an increase in body temperature. On the day after ovulation, the corpus luteum is formed and the luteal secretion of progesterone causes the body temperature to rise by about 0.6 degrees Celsius, resulting in a high and low body temperature change. 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 you are pregnant, the body temperature continues to be high because the corpus luteum is supported by the hormones secreted by the embryo 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 basal body temperature of normal women of childbearing age varies cyclically, as does the menstrual cycle, and this change in temperature is associated with ovulation. The basal body temperature of women is as regular as the physiological cycle, and the basal body temperature of women with normal ovulation, from the day of ovulation to the day of ovulation, the low temperature period lasts about two weeks; from the day of ovulation to the day of the next menstrual period, the body temperature rises 0.3
～From the day of ovulation to the next menstrual day, the temperature rises by 0.3 to 0.5 ℃, and the high temperature period lasts about two weeks. This kind of low temperature curve is called biphasic temperature curve, which indicates that the ovaries have normal ovulation function, and ovulation usually occurs before the rise of body temperature or in the process of rising from low to high. The length of the menstrual cycle varies from person to person, ranging from 21 to 35 days, with an average of 28 days, separated by the day of ovulation into the follicular phase before ovulation and the luteal phase after ovulation. The length of the follicular phase varies, but the luteal phase is fixed at about 14 days and the next two days. On the day after ovulation, the luteal phase is formed by the ovaries, and the secretion of luteinizing hormone causes the body temperature to rise by about 0.6 degrees Celsius, resulting in high and low body temperature changes. The high temperature period lasts about 12-16 days (average 14 days). 1.If there is no pregnancy, the corpus luteum atrophies and stops secreting luteinizing hormone, the body temperature drops and returns to the basic line, and menstruation comes. 2.If you are already pregnant, because the corpus luteum is supported by the hormone secreted by the embryo, it continues to secrete luteinizing hormone and the body temperature continues to be high. 3.If the ovaries are malfunctioning and there is no ovulation and no corpus luteum formation, the body temperature will continue to be low.