For how to stop progesterone, it depends on what the patient is taking progesterone for, because the time to use progesterone is different for different diseases. If the patient comes to the hospital for an ultrasound because of irregular periods and the endometrium is found to be thicker, progesterone is usually taken for 5 days and stopped for 3-5 days to have a menstrual flow. If you are treating irregular menstruation, most of them need to be used in conjunction with estrogenic drugs. Generally, progesterone is used from the 15th day of menstruation, and after 10 days of use, you will stop taking it for 3-5 days, and then you will have your menstrual cycle artificially adjusted to about 28 days once, but you have to take it for 3 months to adjust your menstruation.