Patient's question:
How does a woman's basal body temperature change during a one-month cycle?Doctor's answer:
Hello; Under normal circumstances, maintaining six hours of full sleep at night, without any activity or speech upon waking, placing a pre-placed thermometer in the mouth, and measuring the body temperature for five minutes is referred to as the basal body temperature.The basal body temperature of normal fertile women exhibits cyclical changes, similar to the menstrual cycle. This is due to the influence of the corpus luteum on the body's temperature-regulating center. This temperature variation is related to ovulation.
A woman's basal body temperature follows a regular pattern, mirroring the physiological cycle. For women with normal ovulation, the basal body temperature changes around the day of ovulation. From the onset of menstruation to the day of ovulation, the low-temperature phase typically lasts for about two weeks. From the day of ovulation to the start of the next menstrual period, the body temperature rises by 0.3-0.5°C, and the high-temperature phase also lasts for about two weeks.
This temperature curve, characterized by a low phase followed by a high phase, is known as a biphasic temperature curve. It indicates that the ovaries have normal ovulation function, and ovulation generally occurs before the temperature rise or during the process of rising from low to high.