The maximum number of days that progesterone can be taken depends on the specific situation. If it is menopause to regulate menstruation, generally need to take about 5 days on it, can also be appropriate to extend the time; if it is the case of postmenstrual dripping, need to do the relevant examination after, may need to take about 10 days, need to take 3 months. To regulate menstruation, it is necessary to strictly follow the doctor’s instructions and not to increase the dosage or extend the time of taking it, so as to avoid causing endocrine disorders and the next menstrual disorder. In case of pre-eclampsia, the treatment should be based on the abdominal pain, vaginal bleeding and progesterone value of the pregnant woman, and should be stopped when the symptoms are relieved and the progesterone value in the blood is normal. According to the examination results of the pregnant woman, it is necessary to take the drug for a long time, and it can be stopped after the third month of pregnancy.