How many days is the luteal phase generally? How many days before menstruation does the basal body temperature drop?

Patient's question:

No

Doctor's answer:

On the day after ovulation, the ovary forms a corpus luteum, which secretes progesterone, causing the body temperature to rise by about 0.6 degrees Celsius and resulting in a biphasic temperature pattern. The high-temperature phase lasts for approximately 12-16 days (average 14 days).