If a woman’s menstrual cycle is delayed for more than half a month and pregnancy has been ruled out, she needs to use drugs to promote menstruation as soon as possible. If a woman is taking progesterone to promote menstruation, it is recommended that she take it twice a day, 100mg each time, and the time of taking it should be judged according to the thickness of the lining of the woman’s color ultrasound; if the thickness of the lining of the woman’s color ultrasound is 8mm or more, she only needs to take it for 7 days, but if the thickness of the lining of the woman’s color ultrasound is 6mm or less, she needs to take it for 10 days or so.